What Is the Circumference of a Basketball Rim?
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A standard professional basketball rim has a circumference of 30 inches. Its diameter is 18 inches, and the top of the rim is 10 feet in height from the floor.
A standard backboard is 6 feet by 3.5 feet, and the white box drawn onto the board is 18 inches tall and 24 inches wide. A standard professional men’s basketball is 29.5 inches in circumference, leaving only a half-inch of free space for the ball to travel down through the hoop. A regulation women’s ball has a circumference of 28.5 inches. A men’s ball weighs 22 ounces, and a women’s ball weighs 20 ounces.
