Guide
Youth bat sizing
A chart gets you close. Two simple swing checks get you right.
How to read this: our sizing model is a v1 heuristic built from multi-source manufacturer sizing guidance plus your player's measurements and current-bat feel. It is a starting point, not a validated scientific measurement — when our confidence is low, have your player swing the bat in person before you buy. USSSA age-group drop rules (13U: -8 or heavier, 14U: -5 or heavier) override any chart, and local leagues can be stricter still.
Starting length by height and weight
| Height | Weight | Starting length |
|---|---|---|
| 3'5" – 3'8" | 40 – 50 lb | 26" – 27" |
| 3'9" – 4'0" | 50 – 60 lb | 27" – 28" |
| 4'1" – 4'4" | 60 – 70 lb | 28" – 29" |
| 4'5" – 4'8" | 70 – 90 lb | 29" – 30" |
| 4'9" – 5'0" | 90 – 110 lb | 30" – 31" |
| 5'1" – 5'4" | 110 – 130 lb | 31" – 32" |
Use height and weight together. When the two disagree, weight and strength usually win for weight, and height wins for length.
The two checks that matter
- Hold-out test. Have your athlete hold the bat straight out at shoulder height for 20 seconds. If the barrel drops, the bat is too heavy for them today.
- Barrel-control test. Watch five easy swings. If the barrel arrives late or the hands drift forward to compensate, drop an inch or go a lighter drop before you go up in price.
Common mistakes
- • Buying long “to grow into it” — a season of poor contact is the real cost.
- • Matching a teammate’s bat instead of your own athlete’s strength.
- • Replacing a bat that already fits. That is often the worst-value purchase.