NBA basketball history has been a prestigious one. This is an American game that is now played by basketball players around the world. NBA basketball court dimensions are 50 feet wide and 94 feet long. The center circle should have a 6-foot radius if you want to meet professional regulation. Basketball hoops are 18 inches in diameter with 15-18 inches in white net length. NBA basketball teams use a ball that is about a half-pound heavier than a football. The home team is always responsible for game balls. NBA basketball rules can differ slightly from college rules. What do you think is the most unknown basketball regulation?  Here is a "best of" video for NBA slam dunks.