A standard NBA basketball is 9.43 to 9.51 inches in diameter, or 29 5/8 to 29 7/8 inches in circumference. It is inflated to a pressure of 7.5 to 8.5 pounds.Know More
Other leagues have slightly different requirements for their basketballs. The diameter of a regulation WNBA basketball is 9.07 to 9.23 inches. The diameter of a FIBA basketball is 9.78 inches. NCAA basketballs must be 9.39 to 9.55 inches for men or 9.07 to 9.23 inches for women. The typical diameter of a grade-school basketball is 8.67 to 8.83 inches.
Basketballs are produced in smaller sizes for various other applications, such as children's playthings or promotional giveaways.Learn more about Basketball
The weight of a standard basketball is 20-22 ounces when fully inflated. However, the size and weight of a basketball typically depends on the age, gender or skill level of the player.Full Answer >
Basketball was invented in Springfield, Mass., at a YMCA training school in December 1891 by Dr. James Naismith. Dr. Naismith, an instructor at the school, was looking for an athletic distraction for students while confined indoors during the cold New England winter.Full Answer >
More air inside a basketball will make it bounce higher. The additional air hardens the leather or composite shell of the ball, making it more buoyant.Full Answer >
The mass of a basketball varies between 12 ounces and 22 ounces. There are different sizes of basketballs for men's, women's and youth games, as well as mini-balls for small kids.Full Answer >