The wrong size glove is a liability. Too big and the ball rattles around, transfers are slow, and young players develop bad habits fighting the leather. Too small and you're stabbing at balls instead of catching them. Sizing a baseball glove isn't guesswork — it's measured, and once you know the numbers, you'll never buy wrong again.

How Baseball Glove Sizes Are Measured

Glove size is measured in inches from the tip of the index finger to the heel of the glove (the bottom of the palm). That's it — one number, and it tells you most of what you need to know. Youth gloves start around 9 inches; adult gloves run 11 to 13+ inches depending on position.

Baseball Glove Size Chart by Position

Catcher's mitts are measured by circumference rather than length — that's why the numbers look different.

Fastpitch Softball Glove Sizes

Softball uses a bigger ball, so the gloves run bigger:

How a Glove Should Fit

• Snug, not tight. Your hand should fill the glove without swimming in it. If you can shift the glove around on your hand with a shake, it's too big.
• Fingers reach, not jam. Fingertips should sit near the tops of the finger stalls without pressing hard against them.
• You control the close. You should be able to squeeze the glove shut with normal hand strength. If a young player can't close it, it's too stiff or too big — not "something they'll grow into."
• The pocket sits right. When you catch, the ball should land in the pocket, not the palm or the web edge.

Common Sizing Mistakes

Buying big "to grow into." The #1 youth mistake. An oversized glove teaches a kid to catch wrong — they'll develop a habit of stabbing and trapping instead of receiving cleanly. Buy the size that fits this season.

Copying a pro's size blindly. Pros choose sizes for their position and preference — an outfielder's 13" gamer would be a disaster at shortstop. Match the size to the position first.

Ignoring the break-in factor. A quality kip leather glove will mold to your hand and play slightly "smaller" once broken in. If it's borderline snug out of the box, that's usually right.

The Ronin Standard

Here's our advantage: every Ronin glove is built to order, so you're never stuck choosing between "close enough" sizes off a rack. Tell us the position, the player, and the preference — shallow or deep pocket, stiff or game-ready — and we cut the glove to fit the hand, not the shelf. Every custom includes free professional break-in, so it arrives sized, shaped, and ready.

THE RONIN WAY: measure twice, cut once. Know your number, match your position, and never let a glove wear you.

Still deciding? Our founder's book Beyond the Logo walks through choosing the right glove — size, leather, web, and fit — in complete detail.