Glossary
Little League bat rules
Little League baseball bats must carry the USA Baseball mark through the Major Division, may also be BBCOR in Intermediate 50/70 and Junior League, and must be BBCOR or one-piece wood in Senior League, with a 2⅝-inch barrel at most.
- League
- Little League
- Sport
- Baseball
- Ages
- Every baseball division, Tee Ball through Senior League
- Rule year
- 2026
- Source
- Little League Rule 1.10: Bat Rules
- Last checked
- November 6, 2026
Leagues can set their own limits. Check your league's rules before the season.
Little League's bat rule (Rule 1.10) turns on the stamp, not the brand. Through the Major Division, a non-wood bat must carry the USA Baseball (USABat) mark, which certifies it hits no harder than a wood bat. A bat without the mark is illegal no matter how new or expensive it is, and so is the 2⅝-inch big-barrel bat many travel teams use under the older USSSA standard.
The rules widen as players move up. Intermediate 50/70 and Junior League allow USA Baseball bats and BBCOR bats, so a 13-year-old can start swinging the bat they will use in high school. Senior League takes away the USA Baseball option: a bat that is not one piece of wood must be BBCOR certified.
Size limits are per division. Every baseball bat is held to a 2⅝-inch barrel at most. Length is 33 inches at most through the Major Division, 34 in Intermediate and Junior, and 36 in Senior League. Tee Ball has its own bats: 26 inches or shorter, marked for use only with approved tee balls. Wood bats need no stamp through the Major Division, and must be at least 15/16 of an inch at the handle's thinnest point (7/8 for a bat under 30 inches).
An illegal bat is the umpire's to find, but a coach's job to prevent. A bat used in the game that does not meet the rule can turn a hit into an out under Rule 6.06(d), so the managers check bags before the first pitch. Little League softball has its own rule, a 2¼-inch barrel and a BPF 1.20 mark, and it is not covered here.
| Division | Non-wood bats | Max length | Max barrel |
|---|---|---|---|
| Tee Ball | USA Baseball, marked for tee balls only | 26 in | 2⅝ in |
| Minor and Major | USA Baseball | 33 in | 2⅝ in |
| Intermediate 50/70 | USA Baseball or BBCOR | 34 in | 2⅝ in |
| Junior League | USA Baseball or BBCOR | 34 in | 2⅝ in |
| Senior League | BBCOR | 36 in | 2⅝ in |
How it plays out in a game
- A 10-year-old's travel bat says USSSA 1.15 BPF and has no USA Baseball mark: not legal in Little League.
- A 13-year-old in Intermediate 50/70 swings a BBCOR bat: legal.
- A Major Division player brings a 34-inch USA Baseball bat: too long, the limit there is 33.
- A one-piece wood bat with no stamp in the Minor Division: legal.
Put it on a card: Lineup cards.
Set up for this rule
The free bat size calculator suggests a length from a player's height and weight. Check the length it gives against the division's limit above before buying.
Find the right bat sizeFrequently Asked Questions
Can you use a USSSA bat in Little League?
Not in a Little League baseball game. Through the Major Division a non-wood bat needs the USA Baseball mark; a bat with only the USSSA stamp does not meet the rule.
Can a 12-year-old use a BBCOR bat in Little League?
Not in the Major Division, where non-wood bats must carry the USA Baseball mark. BBCOR bats are allowed from Intermediate 50/70 up.
What is the biggest barrel allowed in Little League?
2⅝ inches in every baseball division, Tee Ball through Senior League.
More in the glossary
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