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== == From the USRA Rulebook: "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." In comparison with a tennis ball, a racquetball ball is approximately 1/4 inch smaller in diameter and approximately 0.6 ounces lighter.
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ProfessorThe maximum length is 32 inches and the maximum width 12½ inches. The string surface has a maximum length of 15½ inches and a maximum width of 11½ inches. Grip sizes, from 1 to 5, indicate the circumference of the grip in increments of 1⁄8 inch, starting with 4 1⁄8 inches (so size 5 is 4 5⁄8 inches). "String" is sold in 5 gauges: 15, 15L, 16, 16L, and 17, with the higher numbers indicating thinner string. As a rule of thumb, a tennis racquet will require restringing as many times per year as it is used each week.
The official rules state that a racquetball racket cannot be longer than 22 inches. This includes the handle, bumper guard, and the face of the racket. There are no maximum width requirements.
However, dimensions of racquetball rackets are subject to change depending on the year and brand of racket you use. They are available in a variety of sizes.
The USRA rulebook contains information regarding the measurements of a standard racquetball. Below is a selection of it regarding this.
"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."
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