How to size a baseball bat (length and drop)
The size charts manufacturers use, how drop works, and the mistakes to avoid. Last checked Oct 23, 2026.
Sizing a bat comes down to two numbers: length and drop (length minus weight). Get the length right first, then pick the drop.
Length by age (starting point)
| Age | Typical length |
|---|---|
| 5–7 | 24–26" |
| 8–9 | 26–28" |
| 10 | 28–29" |
| 11–12 | 30–31" |
| 13–14 | 31–32" |
| 15–16 | 32–33" |
| 17+ | 33–34" |
Height and weight beat age. The Bat Finder uses the Rawlings/Easton height-and-weight chart and then caps the result at your league's limit.
Drop by age (guidance, not a rule)
| Age | Typical drop |
|---|---|
| 10 and under | -11 to -10 |
| 10–12 | -10 |
| 12–13 | -8 |
| 13–14 | -5 |
| High school | -3 (BBCOR) |
Common mistakes
- Buying too big "to grow into." A bat that's too heavy slows the swing. If you size up in length, don't also go heavier.
- Ignoring league caps. Little League Majors and below allow 33" at most, and no new USABat is made longer than 32".
- Buying the wrong stamp. Size doesn't matter if the bat isn't legal. See stamps explained.
Sources
Not sure what to buy?
The free Bat Finder gives you the length, the drop and the stamp your league requires in about 20 seconds.
Open the Bat Finder