http://www.baberuthleague.org/bat-rules.aspx

APPROVED BATS FOR 2013:
To follow up our previous correspondence and information posted on the Babe Ruth League website, the following details on all baseball bats approved by Babe Ruth League, Inc. for 2013 local league and tournament play.  Such descriptions are included as part of the 2013 Babe Ruth League Rules and Regulations.

CAL RIPKEN BASEBALL DIVISION
The bat may not exceed 33"in length, and the bat barrel may not exceed 2¼" in diameter.  Only 2¼" barrel non-wood bats marked BPF 1.15 will be allowed.  Wood 2 ¼" barrel bats are allowed.

13-15 BASEBALL DIVISION
The bat may not exceed 34" in length, and the bat barrel may not exceed 2 5/8" in diameter.  All aluminum/alloy barrel bats and all composite handle (only) aluminum/alloy barrels are allowed.  Only composite barrel bats certified and marked BBCOR .50 will be allowed.  Wood barrel bats conforming to the specifications of Official Baseball Rule 1.10 are allowed.