Dudley Senior Softball Bats Line for Adult Men and Women. Free Shipping USA. Financing Available. Make sure to Get the Advanced Bat Break in for Performance. Dudley Senior Softball 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. When choosing what weight your Senior bat should be, go by your past experiences and the unwritten law on it is that it is always better to error on picking a bat on the lighter side versus the heavier side. 2 Financing plans in checkout.