What is the average size of a tennis ball?
What is the average size of a tennis ball? The International Tennis Federation (ITF) oversees the official ball, but the accepted range of size and weight allow for variances from ball to ball. Tennis balls must measure from 2.57 to 2.70 inches in diameter and weigh between 1.975 and 2.095 ounces, leaving a bit of wiggle room for differences.