Sizes of bats. Law 6 of the Laws of Cricket, as the rules of the game are known, state that the length of the bat may be no more than 38 in (965 mm) and the width no more than 4.25 in (108 mm). Bats typically weigh from 2 lb 7 oz to 3 lb (1.2 to 1.4 kg) though there is no standard.