Which bats are legal in USA Softball slow pitch?

Q: Which bats are legal in USA Softball slow pitch?

Under Rule 3, Section 1, a legal bat must: be no longer than 34 inches, no heavier than 38 ounces, and no more than 2.25 inches in diameter at its largest part, carry a USA Softball certification mark. Both current marks are legal in slow pitch: the one allowed in all games and the one allowed in slow pitch, men's and boys' fastpitch and men's modified, appear on USA Softball's list of approved bat models and not on its Non-Approved Bat List, have a grip 6 to 15 inches from the knob, a knob at least 1.6 inches across, and no dents, cracks, burrs or rattles. Altered bats are illegal: rolled, shaved, repainted, weighted, heated, cooled or otherwise modified. Bat warmers aren't approved. Your name or number laser-marked or painted on the bat is fine. Since 2026, a properly attached bat sensor is allowed. Senior softball bats are legal only in senior play. Penalties (Rule 7, Section 6): Altered or non-approved bat: the batter is out and ejected. Otherwise illegal bat (for example, a damaged one): the batter is out. If discovered after the at-bat but before the next pitch, other runners go back to their bases.

Question

Accepted Answer

Under Rule 3, Section 1, a legal bat must:

be no longer than 34 inches, no heavier than 38 ounces, and no more than 2.25 inches in diameter at its largest part,
carry a USA Softball certification mark. Both current marks are legal in slow pitch: the one allowed in all games and the one allowed in slow pitch, men's and boys' fastpitch and men's modified,
appear on USA Softball's list of approved bat models and not on its Non-Approved Bat List,
have a grip 6 to 15 inches from the knob, a knob at least 1.6 inches across, and no dents, cracks, burrs or rattles.

Altered bats are illegal: rolled, shaved, repainted, weighted, heated, cooled or otherwise modified. Bat warmers aren't approved. Your name or number laser-marked or painted on the bat is fine. Since 2026, a properly attached bat sensor is allowed. Senior softball bats are legal only in senior play.

Penalties (Rule 7, Section 6):

Altered or non-approved bat: the batter is out and ejected.
Otherwise illegal bat (for example, a damaged one): the batter is out.
If discovered after the at-bat but before the next pitch, other runners go back to their bases.