Essential Guide to Tennis String Length

A standard tennis racket needs around 40 feet of string for a single restring.

That equals 12.2m in metric, which is why ReString and most string brands package single sets at exactly 12.2m and reels at 200m (around 660 feet).

Tennis string is manufactured and labeled in metric worldwide, so you'll see metric measurements on every package you pick up.

This guide walks through the 40-foot standard, how that length splits across mains and crosses, the variables that nudge it up or down, when to choose a set over a reel, and how to measure cleanly from a reel.

Standard Tennis String Length for One Racket

40 feet is the universal benchmark for stringing a single tennis racket and the length almost every stringer reaches for by default. It carries enough margin to cover nearly any modern frame, head size, and string pattern with a small safety buffer at the end.

This is the reason ReString single sets of Zero, Slap, Sync, and Vivo come pre-cut at 12.2m (40 feet), ready to string straight out of the sleeve with no measuring required.

How That Length Splits Between Mains and Crosses

A standard restring divides roughly 60% to the mains and 40% to the crosses.

The mains take around 24 feet because they run the full length of the head and are therefore longer overall. The crosses take around 16 feet, weaving across the shorter dimension of the head.

Racket Factors That Affect How Much String You Need

Larger head sizes (105 sq in and above) need slightly more string than mid-sized frames in the 95-100 sq in range, simply because there's more area to cover.

Denser string patterns like 18x20 also require more total length than open patterns like 16x19.

These differences usually account for an extra 6-12 inches of string, which is why the 40-foot standard includes a built-in buffer.

Whatever frame you play with, a single set should have you covered.

Choosing Between Single Sets and Reels

Single sets at 12.2m (40 feet) are the right choice if you restring occasionally, want to test a new string, or like the convenience of a pre-cut length. They're also the easiest format to travel with.

200m reels give you around 16-17 rackets per reel and bring the cost per restring down significantly. Reels suit frequent breakers, players who string their own rackets, and stringers who restring for friends, teammates, or clients.

ReString offers both formats across all of our strings, so you can match the format to how often you string.

How to Measure String from a Reel

Measuring string from a reel only matters if you're stringing your racket yourself. If you take your racket to a shop or pro stringer, they handle this part and you can skip ahead.

For DIY stringers cutting from a reel, a few methods work well.

The wingspan method is a fast visual estimate. One adult wingspan is roughly 5.5-6 feet, and a full restring is about seven wingspans. That gets you close to 40 feet without a tape measure.

The racket length method is a stringer favorite. About 9 racket lengths covers the mains and 8 covers the crosses, using a standard 27-inch frame as your ruler. For one-piece jobs, the short side runs about 10-11 feet and the long side takes the rest.

Keeping a stringing log of the exact length your specific racket needs reduces waste over time and lets you cut closer to the minimum on future restrings.

Common Stringing Mistakes to Avoid

Cutting a 40-foot set into equal halves can leave the mains short of the tensioner on the last few pulls. The 60/40 split exists for a reason, and reserving more string for the mains than the crosses makes sure you have enough on both halves of the bed.

The good news is that most strings, including ours, are built with enough buffer in the standard 12.2m length. Even if you split a set down the middle to use in two different hybrid setups, you'll still have plenty to work with.

Polyester strings are also stiffer and stretch less during installation, so allow a touch more length than you would for multifilament or natural gut.

The first time you string a new frame is another moment to be careful. Going too tight on the cut before you know exactly how much length the racket actually takes is an easy way to come up short. Leave yourself extra on that first restring and adjust on the next one.

Skipping the diagonal cut at the end of the string is a small habit worth getting right. A clean diagonal makes weaving faster and keeps the tip from fraying as you pull it through.

Finally, take care of your frame and string as you work. Sharp tools, rushed weaves, and over-tensioned pulls can all introduce damage that shortens the life of both your racket and your strings.

Summary

The simple answer to how much string one racket takes is 40 feet (12.2m), with a small adjustment up or down depending on head size, pattern, and stringing method.

12.2m single sets cover the standard case, and 200m reels make sense once you're restringing often enough to benefit from the savings.

Once you know the exact length your racket takes, you can cut closer to the minimum and reduce waste each time you restring.

If you want to restring less overall, read why ReString strings play better for longer.

About the Author: Juan is the co-founder of ReString. He was born in Argentina, raised in Japan, and moved to the US to pursue college tennis. He now plays as an ATP & WTA hitting partner.