AAU 13U and younger bat rules (2027)
The rule for 2027
There's no bat stamp requirement at this level.
Source: aausports.org · checked Oct 23, 2026
| Stamp | Any bat |
|---|---|
| Max barrel | — |
| Max length | — |
| Drop limit | — |
| Ages | 6–13 |
AAU National Championships: "no restrictions." District and regional events can add their own rules.
What the stamps mean
- no stamp requirement at this level: The organization doesn't restrict bat stamps at this age, but local events can.
What size bat for 13U and younger?
Height and weight matter more than age. These are typical sizes for an average-size player, from the Rawlings/Easton sizing chart and CDC growth charts. For your player's exact size, use the Bat Finder for 13U and younger.
| Age | Typical length |
|---|---|
| 6 | 24"–26" |
| 7 | 28"–29" |
| 8 | 29"–30" |
| 9 | 29"–30" |
| 10 | 29"–30" |
| 11 | 30" |
| 12 | 30"–31" |
| 13 | 30"–31" |
Shop bats for 13U and younger
These links open bats with the right stamp. Check the exact model against the official list before you buy. We earn a commission if you buy, at no cost to you.
Other Other travel organizations divisions
- Game Day USA 8U–12U (Ages 7–12)
- Game Day USA 13U (Age 13)
- Game Day USA 14U (Age 14)
- Game Day USA 15U and up (Ages 15–18)
- 14U and older (Ages 14–18)
This page summarizes the published rule. Your league or tournament can add its own, and its ruling is final. Confirm your bat isn't on a decertified or non-approved list before you buy. More bat questions.
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