The right grip size depends on your hand measurement and the sport you play. For tennis, most adult players land between 4 1/8 and 4 5/8 inches in circumference. For golf, hand length determines whether you need an undersize, standard, midsize, or jumbo grip. The good news: you can measure at home in about 30 seconds with either a ruler or an existing racket.
How to Measure Your Hand With a Ruler
Open your dominant hand with your fingers extended and held close together. Place a ruler along the bottom lateral crease of your palm (the horizontal line roughly where your palm meets your wrist) and measure straight up to the tip of your ring finger. That distance in inches corresponds directly to a tennis grip size.
- 4 inches: US size 4, European size 0
- 4 1/8 inches: US size 4 1/8, European size 1
- 4 1/4 inches: US size 4 1/4, European size 2
- 4 3/8 inches: US size 4 3/8, European size 3
- 4 1/2 inches: US size 4 1/2, European size 4
- 4 5/8 inches: US size 4 5/8, European size 5
- 4 3/4 inches: US size 4 3/4, European size 6
If your measurement falls between two sizes, go with the smaller one. It’s easy to build up a grip (more on that below), but shaving one down is impractical.
The Index Finger Test
If you already have a racket, you can check its fit without any tools. Hold the racket with your normal forehand grip. Then slide the index finger of your other hand into the gap between your fingertips and the base of your palm. If your index finger fits snugly in that space, the grip size is correct. If there’s no room for your finger, the grip is too small. If there’s a wide gap left over, it’s too large.
This test works well as a quick check in a store, but the ruler method gives you a more precise starting point when shopping online.
How Grip Size Affects Your Game
A smaller grip allows more wrist movement, which helps generate spin and racket head speed. Players who rely on heavy topspin often prefer grips on the smaller end of their range for exactly this reason. The trade-off is reduced stability: more wrist freedom means the racket face can twist more easily on off-center hits, making it harder to place the ball precisely.
A larger grip limits wrist motion, which adds stability and control. This can feel more secure at the net and on flat shots, but it may reduce the effortless power that comes from wrist snap. Neither choice is objectively better. It comes down to your playing style and what feels natural in your hand.
One common belief is that a wrong-sized grip causes tennis elbow. A study published in The American Journal of Sports Medicine tested this directly by measuring the activity of the forearm muscles most associated with tennis elbow across different grip sizes. None of the five muscles studied showed significant changes in firing patterns during the backhand stroke, regardless of whether the grip was larger or smaller than the player’s measured size. The researchers concluded that grip size variations are unlikely to be a contributing factor in overuse injuries like tennis elbow, and that players should simply use whatever size feels most comfortable.
Building Up a Grip That’s Too Small
Adding a single overgrip increases the circumference by about 1/16 of an inch. That’s a subtle change, but it’s enough to fine-tune a grip that’s almost right. If you need a bigger jump, a heat-shrink sleeve installed over the handle adds a full size (1/8 of an inch in circumference). This is a more permanent modification, so it’s worth being sure before committing.
Because building up is straightforward and trimming down is not, starting with a slightly smaller grip gives you flexibility to adjust later.
Golf Grip Sizing
Golf uses a different system. You’re choosing between four categories based on hand length, measured from the crease of your wrist to the tip of your middle finger.
- Undersize: Hand length 5 to 6.5 inches (typically women’s S/M or men’s S glove)
- Standard: Hand length 6.6 to 7.5 inches (men’s M or M/L glove)
- Midsize: Hand length 7.6 to 9 inches (men’s L or XL glove)
- Jumbo: Hand length over 9 inches (men’s XL, XXL, or XXXL glove)
Your glove size is actually the fastest shortcut here. If you already know your golf glove size, it maps directly to a grip category without needing to measure. The same general principle applies as in tennis: a grip that’s too thin encourages excessive hand action during the swing, while one that’s too thick restricts wrist release. Most players perform best with whatever size matches their hand measurement rather than trying to manipulate shot shape through grip thickness.
Pickleball Grip Sizing
Pickleball paddles generally come with grip circumferences between 4 and 4 1/2 inches, and you can use the same ruler or index finger test to find your size. One key difference: pickleball players tend to go slightly smaller than their tennis grip size. A tennis player who uses a 4 3/8 grip, for example, might prefer a 4 1/8 in pickleball. The shorter handle and lighter paddle reward more wrist action, and a slightly thinner grip makes quick exchanges at the kitchen line easier to manage.
Building up a pickleball grip works the same way as tennis, with overgrips adding roughly 1/16 of an inch per layer. One thing to watch for is that many pickleball paddles have more rounded grip shapes compared to the octagonal bevels on a tennis racket, so the feel can be different even at the same circumference.
Grip Sizes for Kids
Junior tennis rackets up to 26 inches long typically come in only one grip size, matched to the length of the frame. There’s no need to measure a young child’s hand the way you would for an adult. For kids ages 3 to 5, rackets up to 20 inches are standard. Ages 6 to 8 use 21- to 23-inch rackets, and ages 9 to 10 move to 24- or 25-inch frames. By age 11, most juniors transition to 26-inch rackets, some of which offer two grip options (usually 4 or 4 1/8 inches). At that point, the ruler measurement becomes useful for choosing between them.