Standard specification for NBA basketball courts

The standard NBA basketball court is 94 feet (28.65 meters) long and 50 feet (15.24 meters) wide. The sideline is 2 inches (5.08 cm) wide. The three-second zone (also known as the restricted zone) is 19 feet (5.79 meters) long and 16 feet (4.88 meters) wide. The bisector is 23ft 9in (7.24 m) away, and the inner circle has a radius of 2ft (0.61 m) , with a central line running through it. The proper collision zone is a semicircle with a 4-foot (1.2-meter) radius centered on the center of the basket.