tennis string gauge

Tennis String Gauge: How to Choose One?

Last updated on September 29th, 2022

What gauge tennis string do you use? What are the benefits and drawbacks of using a particular gauge? Do you think that one gauge is better than another for all players?

Different gauges offer different levels of power and durability. Finding the right gauge for your game can be tricky, but it’s worth taking the time to experiment until you find what works best for you. 

For amateur tennis players and professionals alike, it is important to select the right equipment. One such thing to consider is the string for your racket. There are multiple parameters that determine different aspects of the tennis string’s performance. Thus, you can only choose the correct string after all these factors have been carefully assessed. 

One such parameter is the tennis string gauge, which usually refers to the thickness in millimeters of the string. Why is a tennis string gauge important for playing the game? How does one go about choosing it? These are valid questions, especially for those who are just dipping their toes into the sport and exploring it as a hobby. If you are starting tennis as a hobby and choosing a string for your racket, the tennis string gauge is something you must take into consideration.

There are a few things to consider when choosing a tennis string gauge. First, think about your level of experience. If you’re a beginner, you might want to choose a thicker string for durability. On the other hand, if you’re more experienced, you might prefer a thinner string for improved performance. Second, consider what type of tires you’re using. Softer tires will wear down thinner strings more quickly, so you might need to go up a gauge if you’re using softer tires. Finally, think about your playing style. If you hit the ball hard, you might want to choose a thicker string to prevent breakage. Ultimately, it’s up to you to experiment with different gauges to find what works best for your game.

Paragraph: In general, lower-numbered gauges (16 or below) are going to be thicker and more durable strings meant for beginners who hit the ball less hard. These types of strings are also going to be less expensive. As the number goes up into the high teens and low 20s, these gauges get thinner and thinner. They also start to get pricier because they’re generally used by competitive players who require that sort of precision in their game. The half-gauge sizes (L) are in between the two main types of gauges and offer a happy medium in terms of price and performance.

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If you’re not sure what size is right for you, it’s always best to consult with a professional or try out a few different types before settling on one. Gauge is just one aspect of choosing tennis strings, but it’s an important one nonetheless.

Why Is String Gauge Important? 

The thickness of the string is usually referred to as string gauge, and it is commonly within a range of 0.60 to 1.80 millimeters. The gauge is higher when the string is thinner, so you will find that 17-gauge strings are thinner than 15-gauge ones. It is important to realize that each gauge has its own set of defining characteristics that can affect your game in different ways.

There is a certain degree of personal preference when it comes to selecting tennis string, but at the same time, the effects of string gauge on your performance must be considered.

Gauge 16BenefitsPopularitySpinDurability
Gauge 151.41-1.49mmVery durable and stiff with contact with the ballLessMedium-LowHigh
Gauge 15L1.33-1.41mmDurability with a little thinner versionStill a very thick string, less for spin loversMedium-LowHigh
Gauge 161.26-1.34mmA lot of variations exist, good balance for power and spinVery popularMedium-HighHigh
Gauge 16L1.22-1.30mmAnother good power-control optionVery popularHighMedium-High
Gauge 171.16-1.24mmSacrificing durability over spin and powerVery popularHighMedium-Low
Gauge 17L1.10-1.20mmMost power and spinPopularHighMedium-Low
Gauge 181.06-1.16mmHighest spin potentialLess popularHighMedium-Low
Tennis string gauge explanation chart table

Main Insights About String Gauge:

  • A thicker gauge will provide more control, but less power.
  • Thinner gauge strings give you more comfort and speed, but it gives less control than a thicker string. So if you are just starting out in tennis than I would not recommend using the thin string because the accuracy is very limited when using these strings compared to medium or thick strings.
  • Higher gauge counts are less durable but more comfortable and stable.
  • Higher numbers of gauge are great for spin but can be very unpredictable at times.
  • Lower string counts are more durable but can be uncomfortable if not strung properly.
  • Lower numbers are much more reliable and stable, but you won’t get as much power as you would with the higher numbers.
  • When choosing a string gauge it really comes down to comfortability and your personal preference, so remember to play around with different gauges until you find the one that feels most comfortable with your game.
  • The thicker the string, the less playable it becomes. Thicker strings also serve to reduce shock and vibration on off-center shots and improve control.
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Why Is String Gauge Important? 

How To Decide Which Tennis String Guage To Choose?

Firstly, look at the table above to help get a better picture of how thick each gauge each. Secondly, lets explore all the benefits of all, and who should get which gauge for his game.

DurabilityBenefitsGood For:
15-15LVery highSolid feel on the arm, with considerable controlBeginners or players who don’t want to break strings often
16-16LGoodA balance between power and control, most players use itFor most players, it strikes a good balance of control whilst giving a nice power boost, a 16L can give enough power if you will want that.
17-17LLowerA more power oriented string gaugeA more power oriented version, many players do use it as well, you should compare it with the 16 gauge and see which is better for you.
18LowGetting the most power, sacrificing durability the most.For players who don’t care about durability and can afford strings on the fly, and want to exploit a powerful game.
Which string gauge should you choose?

How Does String Gauge Determine Performance?

Experienced players usually know that altering the tennis string gauge can make or break a match. Indeed, at times, experienced athletes alter their style of play according to the string gauge. There are different ways the thickness of the string affects your game by affecting different properties of the string.

String Longevity

One main characteristic any player wants in their tennis string is durability. If a certain set of strings are sure to last for a longer period of time, buying them gives you a better bang for your buck and ensures that you will spend less time and money re-stringing your rackets. In this case, it is important to note that strings with a thicker width (i.e., a smaller gauge) are usually very sturdy and last for longer periods.

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Spinning Capacity

The higher the gauge, the greater the spinning potential of the tennis string you purchase. Thinner strings usually give you better control of the ball and more spin, allowing you to direct the ball to a specified area of the court with greater precision and accuracy.

Tactile Sensation

Tennis strings with different gauges have a different feel to them. Strings with higher gauges tend to give an enhanced feel to the player. 

String Gauge Measurements

It is important to understand that each string gauge does not have a standardized measurement. Rather, it has become common in the industry to find one string gauge with a range of thickness. For example, the 16-gauge tennis string varies between 1.26 and 1.34 mm in width. The string gauges that are most commonly used are 16, 16L and 17, all of which come in a variety of widths.

Does Manufacturing Material Affect String Gauge?

Now, one point to note is that even within the same gauge, manufacturers may use different materials to make the string. This can certainly have an impact on the quality of the string and affect your performance. Hence, it is important to consider both the thickness and material of a string when choosing a gauge. Following materials are most often used to make a tennis string:

Natural Gut

This type of material is suitable for beginners or players who are less likely to play for long periods.

Strings made from natural gut usually offer a large amount of power and are comfortable to use. However, they have a tendency to break very easily, which decreases their longevity greatly. They are also affected by moisture in the air and can become easily damaged.

Synthetic Gut

This type of material is mostly suitable for tennis enthusiasts who are playing for recreational purposes and tend to play occasionally.

Synthetic gut-based strings typically feature a well-balanced set of characteristics, offering players great performance in all aspects. The only downside is that they are less durable, so they are more suitable for players who have the budget and time to keep re-stringing rackets or for players who spend less time on the court.


This artificial material is a great substitute to gut-based strings and can be used by hobbyists or mid-level players who are looking to enhance their skills.

These strings are made to replicate natural gut and offer a great amount of power. They are designed to be comfortable. In addition, they typically maintain their tension for longer periods of time, thereby increasing their longevity.

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These strings can be used by seasoned professionals and for those looking to improve their existing tennis skills.

These strings are an excellent buy as they have great spinning potential and maintain their durability for long periods, thus making them a good investment for seasoned players. The only problem with them seems to be that they can lose tension faster than other strings.


These strings can be used by anyone who is sure to stay on the courts five days a week. 

Those who have a higher frequency of playing can always stand to benefit from strings with good longevity, as they will have to spend less time and energy on re-stringing their rackets. 

Which Tennis String Gauge Is for You?

After understanding all the aspects of a tennis string gauge, it is now easy to determine which one is for you based on your own needs and preferences. Here are some factors to keep in mind when shopping for tennis strings with different gauges:


One thing to consider is the level at which you play. Experienced players usually go for string gauges with better tactile sensation, as they have tried different string gauges and know what works for them. For beginners, it is always better to opt for a lower gauge, as the added thickness will give you the power you need and put less strain on your wallet as you won’t need to re-string your racket frequently.

Amount of Time Spent Playing

The more time spent playing on the field, the greater the wear and tear on your tennis strings. It is always smarter to select a more durable string if you are looking to hone your skillset with a lot of regular practice.

Financial Considerations

Consistently re-stringing your tennis racket can put a strain on your wallet. Some serious players are willing to make that investment as they like the control and spinning power offered to them by higher gauge rackets. Other athletes prefer a more durable material that will promise greater longevity and give them more power when they play.

The world of tennis string gauges can be daunting at first, but after understanding all the different aspects, it is now a simple task of determining which gauge fits with your preferred style of playing.

What gauge of string should A Beginner get in tennis?

If you are picking up a tennis racket for the first time, it is important to choose the right string gauge. This will impact how the ball feels when to hit and how easy it is to control. So, what should beginners go for? 

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I’d recommend for a starter to choose a 16L gauge, which measures 130mm in thickness for your tennis racket.

It’s highly dependent upon your game. For many players, 16 is too thick and 17 is too thin. If possible I would suggest that you shop for a string by finding an already strung racket then use that as a baseline for how much to pay for the same gauge/brand/type of string used on the existing racket.

Some brands strung at 16 will break often, while others strung at the same tension will not. Some brands that are 17 gauge string last much longer than other 17 gauge strings.

How does string thickness affect playability?

A tennis string’s gauge refers to its thickness as measured by the number of thousandths of an inch. As a string gets thicker, it also gets stiffer and more durable.

There are differing opinions on whether string thickness affects playability at all. Some people claim that there is no difference between strings of different gauges because each one can be strung to the recommended tension range for that type of string.

However, in practice, this is often not the case because thinner strings are more difficult to string at that tension. They also have a higher tendency to move out of place when in use or when being strung. Thick strings may be difficult to control during play if they are strung too loosely.

Typically, 16 and 17 gauge strings offer more control and feel on the ball because they are more elastic and thinner. Thinner string is easier to bend around the frame corners, which gives a lot of spin potential on groundstrokes and serves.

Different perspectives on string gauge:

Spin Potential

Thinner strings can have more potential for spin than thicker ones. When the string is less stuck, it has a higher biting force and snaps back into the position faster after being released from your racket or hand without providing as much grip on felt which allows you to generate topspin with little effort (pulling harder). Thinner material means there’s also less friction so this leads us to all sorts of possibilities such as making our shots more powerful!

A thick-gauge might take longer before snapping but when they do snap back, every ounce counts delivering big power and great control.

But then we have to remember that there is one other major factor that contributes to the spin and power on a ball which is the string pattern and tension.

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Thicker strings are more stable than thinner ones because there’s less vibration due to their lower elasticity. They also provide more comfort as they cushion impact better than thinner strings. They also transfer less shock to your arm which is something that has been known to cause injury if done too often for too long.

Thinner strings are more elastic and vibrate more on impact. This can lead to some serious instability in your game because different string materials have different amounts of stability properties. Expect the ball to move around more when hitting with a string that is too thin for your liking.


Tennis players with thinner strings tend to play more aggressively and accurately because the thinness of their tennis racket makes them able to produce a great deal of power. With thicker, heavier rackets it’s difficult for one player in general due to much resistance on every stroke. This causes your shot accuracy rates decrease significantly which could potentially cost you points, but this is why thinner strings are usually meant for more proficient players.

On the other hand, a good player is not going to hit with as much raw power as a beginning or intermediate player would because of control.

The string elasticity has a lot to do with this! This means you’ll want to use a more comfortable racket with less tension but still provides enough feel so you can feel what’s going on.


The feel is an emotional element that players find more appealing with thinner strings. Many will say they provide a softer touch and better tone, but some also claim it affects how well your shots land.

Tennis players love to experiment with different string types and gauges. Some, like me, find that thinner strings offer them more feel while others may prefer thicker gauge for better durability or feel output qualities. One area where changes in this regard can be noticed immediately is the way a player feels when playing; some report enhanced sensations from 17 gauge which give off less tension than their 16 gauge counterparts–I happen to enjoy feeling every stroke on my racquet.

Feel varies because of different materials and their characteristics also of course.

Polyester is known to be the stiffest sting on the table, so a think polyester would be tough for most players to handle consistently.


When you play tennis, your strings produce friction at the cross-sections where they overlap each other. Over time this will cut into them and turn their color from bright to duller shades of blue or green as it is prone to wear down more quickly than thinner ones because there’s more exposed surface area interacting with a given amount of force before things start getting slippery again (that means heavy-gauge = longer life!).

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When comparing different gauges for the same string, thicker is usually better. However, keep in mind that a wide variety of factors can influence how long your strings last such as material construction tension and density pattern, etc.. All else equal, thicker strings will provide you with more durability.

String Gauge and Performance

The thickness of a tennis string impacts performance in many ways. Thinner strings generate more power, while thicker ones have the opposite effect and produce less spin as well! For example: thinner gauge = faster tension relief/elasticity.

On average therefore providing you with softer feel which some people prefer over stiffness due to comfort considerations – but there’s no rule here because everyone has different preferences when it comes down what feels best for them personally (plus we’ll always keep our eyes peeled out any opportunities where thickening up might be helpful).

Nowadays’ materials also allow us make great strides forward without sacrificing too much durability so players can get all those benefits from high performing strings.

Frequency of Play

Frequency of play is another factor to consider when stringing up your racquet. If you’re only playing twice a month, then the longevity might not be as much on your mind, and using thicker gauge strings could make sense since they will last longer than higher gauges anyway.

However, if weekly activity means that every week there’s restringing involved (and this becomes an expensive habit) then it would probably benefit players better by utilizing thicker wires which won’t wear out quickly.

Thin enough for daily use yet still durable/string-like feel – would come at a cost of restringing often, but it has its advantages for sure.

Hybrid Stringing

It is not uncommon for players to use different string combinations when they play tennis. Some popular examples include using fresh, high quality enough gauge strings on your mains and crosses while opting closer in gauges with heavier tension or reduced endurance if you’re playing aggressively rather than defense oriented.

Some people may also use a type of string to create a hybrid between their mains and crosses if they happen to be playing an uneven combination there. For example, if you wanted a little more feel from the thinner gauge, combine it with your main strings for even wear since crosses will wear down first as they are exposed more often to friction.

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Hybrid stringing can be difficult to master, but the pros know that it’s important. For instance: one type of gauge will offer more power when shot from farther back on the court or slower tension for close shots where accuracy is key. A lot of popular players combine different combinations based on what they need at any given time during gameplay.


Tennis strings offer a variety in terms of stiffness and comfort. It is difficult to say which type will be more beneficial for you, but higher gauge tennis strings may cause pain if played at lower denser gauges or with softer balls since they provide less assistance when striking the ball compared with thicker ones. To help find your perfect fit there are two things I would recommend considering: 

1) The tension level (how tensioned/ loose); 2), What types(polyester vs nylon). You can experiment by trying out different combinations until one feels right.

If you’re a beginner it’s going to be beneficial for you to choose a thicker gauge because the ball will “sit” better on the strings and stay there allowing you more time to reposition yourself as well as adapting to your style.

Advanced players might do better with thinner, more sensitive strings for better control. This is especially true when playing with more powerful balls, in which case the point of contact with each strike will be so short that baseliners need every millisecond to help them readjust accordingly.

Most players stick with one gauge because of the comfort it offers actually. Either that, or they use hybrids. Of course, there are always exceptions to the rules, but these are just good general guidelines when stringing your racquet.

String Gauge and Tension

String gauge and tension can be a complicated topic. What’s best for you depends on what type of string, the player’s level of play, and personal preference.

The tension in your tennis strings has an effect on the feel, power and spin. If you’re not sure what tension to use, experiment with different tensions until you find one that feels best for you.

That’s why it is important to experiment with different gauges and tensions in your tennis strings. It may take a little time, but this tweaking will result in the perfect stringing combination for you.

Which tennis string is thicker 16 or 17?

A gauge of 17(125mm) is thinner, while a 16L is thicker (130mm).

What is the difference between 1.25 and 1.30 strings?

So, which one should you choose? Well, it really depends on what your own preferences are. If you’re looking for a string that is more durable and has better tension maintenance capabilities than nylon strings, then polyester might be the best option. 

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On the other hand, if you prefer an easier-to-handle string with less tension maintenance then nylon might suit your needs better. 

The choice of whether or not to use 1.25 vs 1.30 gauge strings will depend largely on personal preference so try both out before deciding.

What is ‘L’ in string gauges?

When selecting a gauge, often it strikes you that you have to jump a lot in thickness between 17 gauge and 16, or from 15 to 16, so there are special editions of the strings which are ‘lighter’, allowing you to pick a slightly lighter string.

A ’17L’ is a 17 gauge string but in a lighter fashion, which is the midway between a gauge 16 to a gauge 17. Companies produce these to reach to greater markets and audiences of players, and their preferences.

What gauge strings does Nadal use?

Nadal uses an ‘RPM Blast 15L’ version from Babolat.

Do thinner tennis strings make a difference?

As a result, the string bed is more responsive and lively. 

These strings are easier on the arm as well because there is less tension pushing back on you as you swing through your shots. A combination of thinner gauge and nylon materials will give players an extremely enjoyable playing experience.

For those who like to feel their racquet against their strings but still want power, a thinner gauge string is ideal. Thinner strings will offer you more control and an optimum feel.

Another good thing about using a thinner string for tennis is that it’s easier on your arm. When faced with playing many hours of competitive tennis this can be a welcome relief to the wrist and elbow joints. And because there is less resistance when striking the ball, you can swing through your shots more freely.

Thinner tennis strings are great for those who can sense the little nuances in the play and the hitting of the ball, and know-how to master a swing correctly to achieve more power, while retaining control.

What kind of strings do pro tennis players use?

Most professional tennis players go for synthetic gut strings. These strings offer the perfect balance of power and comfort to ensure that players get maximum performance on the court, while still being able to hold up against long periods of tough matches without breaking.

Pro players care less about the budget (some do), and put emphasis on performance, durability, and making good decisions for the game. If your racket is strung with synthetic gut, then you can be assured that it offers the perfect balance of performance that works for them!

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Are thinner gauge strings easier to play with?

Yes, they are! Thinner strings give you more control and feel because there is less resistance for the ball to push against. So yes, it’s easier on your arm and provides a more enjoyable playing experience.

They are quite similar to multifilament but have a little more bite on the ball so that it kicks off the court. They also add more spin to your shots due to their ‘grabby’ nature. However, thinner gauge strings do not give you as much power on your shots because you have less space between each string for them to coil into.

Will thinner gauge tennis strings increase the trampoline effect?

Yes, the trampoline effect is what you get when you hit a ball with a string bed that gives your shot extra power. Thinner strings have more elasticity, which allows this to happen easily.

So thinner gauge strings will ensure you get an added dose of power on each shot.

Does changing string gauge affect spin?

Actually, it’s more about the string tension than the gauge of the tennis strings. As you increase the tension on your racquet, this will give you a lot more spin and power.

Thinner strings and more ‘square-shaped’ ones are more spin friendly than thicker ones, if you combine a higher tension, with square strings and thinner gauges you are pretty much maxed out from a spin perspective.

Does string gauge matter?

The gauge of your tennis strings is not an overlooked specification by many players but it does matter. Thinner strings are easier on your arm, provide more feel for the ball, and give you better spin. Thicker bundles of strings offer more durability but also take away from some of that desired playability that thinner strings will offer. So take into account how durable you want your string to be as well as what type of performance you’re after.

How do I know what gauge my strings are?

Most likely, you’ll know what type of tennis strings came with your racquet when you bought it. But if they broke and you had to replace them with something else, or maybe your racquet manufacturer doesn’t allow their products to ship with standard gauge strings, your best bet is to buy in sets and then check the respective gauges for each string to ensure you get the right ones.

Blog Post Conclusion: Buying a caliper or micrometer on Amazon is the easiest way to identify your tennis racket’s string gauge. They are inexpensive and easy to use.

You can measure the thickness with a ruler or calipers, or simply remove the strings and take a good look at them. Most players prefer to use the world standard for measurement which is in millimeters (mm).


If you’re a tennis player, or just someone who likes to hit the ball around every now and then, you’ve probably heard of string gauge. But what is it? And why should you care? In this post, I answered all those questions and more. I’ve explained all the different types of gauges available for tennis strings, and helped you decide which one is right for you. So whether you’re a beginner or a seasoned pro, I hope I’ve helped you.

As you can see, there are many things to consider when selecting a string gauge for your tennis racket. It will depend on what type of player you are and how experienced you are in the sport.

Do some research into all of these factors before making a decision on which one is right for you! This article has provided plenty of great information that should help get started with your search.

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