Two basketballs can fit in the hoop so the ball is half the size of the rim
The rim is actually about twice the diameter of a regulation basketball. In the NBA, the official ball is made of leather and has a circumference of 30 inches (76 cm) and a diameter of 9 inches (23 cm).Which also means,the rim's diameter is 18 inches.
A basketball hoop is 18" in diameter and the formula for circumference is pi x 18" (3.1415 x 18"=56.54866")
Official Men's size 29.5 inch circumference. Official Women's size 28.5 inch circumference.
The standard diameter of a basketball rim is 45cm.
18"
17 inch diameter rim versus 16 inch diameter rim
The basketball ring is 18 inches in diameter while the ball is nine inches in diameter.
A Basketball goal, or hoop, is about 56½ inches in circumference (56.55 inches). The rim is 18 inches in central diameter, and the top of the rim should be exactly 10 feet off the ground.
The circumference is the distance around. The diameter is the distance across. The radius is half the diameter, from the center to the rim.
eighteen inches
The diameter of the rim is 45 cm so the radius stands at 22.5 cm.
18 inches