A high school basketball court is smaller than a collegiate court. The 3-point line for women's college basketball is a different distance from the goal than the men's three-point line. However, the dimensions of the basketball goal, which includes the rim, net and backboard, are relatively standard across all levels of play.
Rim
The rim is the metal ring that the holds the net. It cannot be more than 5/8 inch in diameter and must be colored orange. The diameter of the rim, measured on the interior, is 18 inches. The nearest point of the inside edge of the rim is 6 inches from the face of the backboard. The rim attaches to the backboard with a bracket that is also colored orange.
Backboard
The shape of the backboard varies among leagues. A high school backboard is rectangular or fan-shaped. A rectangular backboard can be 6 feet wide by 4 feet tall or 6 feet wide by 3.5 feet tall. A fan backboard is 54 inches wide. College and professional basketball backboards are rectangular. A collegiate backboard is feet wide, and 4 or 3.5 feet tall. A professional backboard is 6 feet by 3.5 feet.
Net
The net, which is white, hangs 15 to 18 inches below the bottom of the rim and must check the ball momentarily as it passes through. A high school or collegiate basketball net is made of not less than 120-thread nor more than 144-thread twine. An NBA net is not less than 30-thread nor more than 120-thread twine. The net attaches to the rim on 12 small hooks.
Other Dimensions
The upper edge of the basket rim is parallel to and 10 feet above the playing floor. The edges of the rim must be equidistant from the vertical edge on each side of the backboard.
A high school basketball court is 84 feet long and 50 feet wide. A college basketball court and NBA basketball court are 94 feet long and 50 feet wide.
The free throw line in all leagues is 15 feet from the plane of the backboard.
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