USA Baseball has adopted a new standard for youth baseball bats. Information about the new standard can be found here.
EBSA House Baseball will allow both the new 2 5/8th bats (labeled with a USA stamp) and the old 2 1/4 bats (labeled 1.15BPF) in Middle and Major in 2018. Rookie and Farm will only allow 2 1/4 bats. Old 2 5/8 bats (labeled 1.15BPF) will NOT be allowed in any House baseball. Using one in a house league baseball game will lead to an automatic out and possible further discipline at EBSA's discretion.