Shop our Closeout Bats from Miken, Easton and Worth. Free Shipping US. Get the Bat Break in. Slowpitch bats weights vary from 24 to 30 oz.  The length no longer then 34 Inches long. The Barrel has to be 2 1/4 inch in Diameter. Choosing the Right Bat.  Closeout Bats vary in weights. From 24 ounces to a maximum of 30 ounces. When choosing what weight your next Slowpitch bat should be. Go Lighter. The unwritten rule on it is that it is always better to error on picking a bat on the lighter side versus the heavier side.. “Ray Demarini”