Official Rules of Racquetball

2.2 - Ball Specifications

(a) The standard racquetball shall be 2 1/4 inches in diameter; weigh approximately 1.4 ounces; have a hardness of 55-60 inches durometer; and bounce 68-72 inches from a 100-inch drop at a temperature of 70-74 degrees Fahrenheit.

(b) Only a ball having the approval of the USAR may be used in a USAR sanctioned tournament.