The height of a junior high school basketball hoop is the same as any other hoop:10 feet
If you in high school, it is about 10 feet
A regulation basketball hoop consists of a rim 18 inches in diameter and 10 feet high mounted to a backboard.
The Official Basketball Hoop size is 21 inches
The size of a high school basketball hoop is 18 inches across on the inside. The hoop or ring as it is called is made from 5/8 inch high tensile steel. The entire assembly, which includes a safety feature, in mounted so the top of the ring is 10 feet above the playing surface below.
The inside radius of a basketball goal/hoop is 9 inches.