Basketball Sizes: Chart, Official Sizes, & Size by Age

Basketballs come in six standard sizes, from a size 1 mini up to the size 7. A size 7 basketball is 29.5 inches around and weighs 22 ounces, and it's the official ball for men's high school, college, and professional basketball. A size 6 (28.5 inches, 20 ounces) is the official ball for women at every level, and everything below that is sized for kids by age. The right size depends on the player's age and gender. Get it wrong and you're not just making the game harder... you're teaching bad habits that stick.