Baseball Bat Standards

Updated Sunday November 26, 2017 by Tony Metzler.

New Bat Standards as of Jan 1, 2018.

2018 Rookie, Minors AA, Minors AAA, & Majors Divisions

All bats must have the USA Baseball marking 2 1/4" - 2 5/8" barrel maximum

2018 Juniors Division
USA Baseball marking
2 5/8" barrel maximum

You can read more about the new bat standards at

Starting on January 1, 2018, the new USA Baseball Standard will be implemented across all Little League baseball divisions and Little League-approved bats will no longer be acceptable for use in any Little League game or activity. For more information on the USABat standard and a complete list of bats approved through the USABat Standard, visit


2018 TBall and Farm Division

Starting on January 1, 2018, all Tee Ball bats in the Little League Baseball® Tee Ball program must feature the USA Baseball mark and accompanying text. Tee Ball bats that were produced and/or purchased prior to the implementation of the new standard can be certified using an Approved Tee Ball Sticker (available September 1, 2017) via the USA Baseball Tee Ball Sticker Program for use with approved Tee Ball baseballs for Little League play. Tee Ball bats for Little League Softball® Tee Ball programs must follow the Little League Softball Official Regulations, Playing Rules, and Policies.