2 5/8" Barrel There are 3 products.

Senior League bats are generally 2 5/8" barrel diameter.
Please check with the league before purchasing. Ask which bat diameters will be legal, AND what drop ranges.
By that I mean the ratio between the length of the bat and it's weight. A 30" bat that weighs 20oz. has a DROP of 10.
Some leagues may allow big barrel bats, but only up to a drop 10 or 11.