USA Softball (slowpitch) Senior slowpitch bat rules (2027)
The rule for 2027
Bats must carry the Senior (SSUSA) or USA Softball stamp. Barrel 2 1/4" max. Length 34" max.
Source: usasoftball.com · checked Oct 23, 2026
| Stamp | Senior (SSUSA) or USA Softball |
|---|---|
| Max barrel | 2 1/4" |
| Max length | 34" |
| Drop limit | — |
| Ages | 40+ |
Senior bats are allowed in senior championship play only.
What the stamps mean
- Senior Softball-USA approved mark: Senior bats are approved by Senior Softball-USA and are legal only in senior play. SSUSA keeps the approved and disapproved lists. Official list.
- USA Softball mark (ASA 2000, ASA 2004 or USA Softball "All Games"): The most widely required fastpitch stamp. USA Softball events also require the bat to be on the approved list and off the non-approved list. The ASA 2013 mark isn't legal for girls' or women's fastpitch. Official list.
What size slowpitch bat?
Nearly all slowpitch bats are 34". Weight is the real choice: 26–28 oz suits most hitters.
Shop bats for Senior slowpitch
These links open bats with the right stamp. Check the exact model against the official list before you buy. We earn a commission if you buy, at no cost to you.
Senior (SSUSA) bats
USA Softball bats
Other Slowpitch softball divisions
- Adult & youth slowpitch (Ages 10+)
- USSSA Slowpitch Tournaments (Ages 14+)
- USSSA Slowpitch League play (Ages 14+)
- USSSA Slowpitch Senior (Ages 40+)
- NSA Slowpitch Adult & youth (Ages 10+)
- NSA Slowpitch Senior (Ages 40+)
- Senior Softball-USA SSUSA tournaments (Ages 40+)
- Church / city rec league Local leagues (Ages 14+)
This page summarizes the published rule. Your league or tournament can add its own, and its ruling is final. Confirm your bat isn't on a decertified or non-approved list before you buy. More bat questions.
Not sure what to buy?
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