Youth bats are almost universally governed by the USSSA 1.15 BPF. BPF stands for Bat Performance Factor, and measures the how fast the ball comes off the bat. Bats must meet this BPF standard in order to be approved for play. Nearly all youth bats are stamped with the 1.15 BPF mark.
Other League Certifications
Most Youth bats with 2 1/4 barrel diameters are approved for play in all major Youth baseball organizations. The most popular Youth baseball organizations include Little League, USSSA, Babe Ruth / Cal Ripken, Dixie Youth, PONY, and AABC. Most Youth bats in production today will feature text on their barrels indicating which of these leagues a bat is approved for play. Because regional rules can vary, we always recommend checking with a league director to confirm what bats are approved for your particular league.