Regulation basketball backboards have a width of 72” | 183 cm and a height of 42” | 110 cm with an inner rectangle that is 24” | 61 cm wide and 18” | 45.7 cm tall. For casual non-regulation courts, smaller Fan-Shaped Backboards are often used. Basketball rims are hung 10’ | 3.05 m above the court floor. Fan-Shaped Backboard
The NBA 3-point line is 23.75 feet from the hoop, 22 feet in the corners. The FIBA 3-point line is 22.15 feet from the hoop, 21.65 feet in the corners. The WNBA uses the same 3-point line as FIBA.
The height of NBA basketball hoop is 10 feet. When James Naismith, the guy credited with inventing the game of hoops, drafted the first-ever rules of the game, he set the height of the basketball rim as 10 feet.
The regulation distance from the ground to the top of the rim is 10 feet for all levels of play. Regulation backboards are 6 feet wide (72 inches) by 42 inches tall. All basketball rims (hoops) are 18 inches in diameter. The inner square on the backboard is 24 inches wide by 18 inches tall.
Home management is required to have a spare board with supporting unit on hand for emergencies, and a steel tape or extension ruler and a level for use if necessary. Each basket shall consist of a pressure-release NBA approved metal safety ring 18” in inside diameter with a white cord net 18” in length.
Naismith, who went on to receive a medical degree, set the basket rim height at 10 feet in the original 13 rules for the game, a standard still upheld by the National Basketball Association 125 years later.
According to both organizations, the basketball backboard must be a flat, transparent board that is 6 feet wide. The NBA allows only one height, 3 1/2 feet. However, although the NCAA regulations favor a 3 1/2-foot height, 4 feet is allowed.
In all professional leagues, it is somehow a rule to set the rim on 10 feet higher. But there’re also some sectors where the 10 feet rim height will be difficult for the player to play. The rim height should be lower at those levels, Junior level: 10foot rim height is too high for young men or women.