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.Continue Reading
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 official height of a regulation NBA basketball hoop is 10 feet from the floor, and the backboard extends another 3.5 feet vertically and 6 feet horizontally. The hoop is 18 inches in diameter. The height of the hoop is standard across all levels of play.Full Answer >
The official ball size for the National Basketball Association and most other professional adult men's associations is a circumference of 29.5 to 30 inches and weighs 18 and 20 ounces. Official balls for the Women's National Basketball Association have a circumference of 28.5 inches.Full Answer >
A National Basketball Association regulation backboard measures 72 inches horizontally and 42 inches vertically. Official NBA rules also stipulate that the backboard must be flat and transparent.Full Answer >
The square on a basketball backboard that helps players guide banked shots measures 18 inches vertically and 24 inches horizontally. The lines of the square must be white, 2 inches in width and centered above the rim.Full Answer >