The weight drops include -12 to -5. Bats featuring the “USSSA 1.15 BPF” sticker will be legal for USSSA play. USSSA did not adopt the new USA Baseball Bat rule change. If the length of your bat is 31 inches from tip to tip, and the weight is 20 ounces, then it’ll have drop 11 or -11. In simple terms, the difference between the bat weight and bat length is termed as the ‘drop’ or ‘drop weight’ of your baseball bat. Subtract the length (in inches) fromthe weight (in ounces) to determine the drop. The rules for USSSA bats have not changed and they will continue to use USSSA approved baseball bats. These bats vary in barrel size from 2 5/8” to 2 3/4”. A bat that is 30inches long and weighs 35 ounces would have a drop of 5. DeMarini Voodoo Balanced -5 Drop 2 5/8" Baseball Bat by DeMarini 1 new & used offers from min price $289.95