Frequent question: What is the diameter of a size 4 basketball?

What is the diameter of a basketball?

What is the Diameter of a Basketball? A standard NBA basketball has a diameter between 9.43 and 9.51 inches. In the WNBA, the basketball has a diameter of between 9.07 and 9.23 inches. Basketballs used in the NCAA are between 9.39 and 9.55 inches for the men and 9.07 and 9.23 inches for the women.

What is the diameter of a size 5 basketball?


Size Type Circumference
6 Women 715–730 mm 28.1–28.7 in
5 Youth (North America) Mini (FIBA) 685–700 mm 27.0–27.6 in
4 Youth (North America) 25.5 in (65 cm)
3 Mini (North America) 22.0 in (56 cm)

What is the diameter of a 27.5 basketball?

Youth players are looking at a different set of parameters. The standard youth basketball size – size 5 – comes in at 27.5 inches in diameter, weighing 17 ounces. This is primarily for players aged between 9 and 11, boys and girls.

How big is a size 3 basketball?


Size 3 is a novelty-sized, or ‘mini’ basketball that is suitable for all ages. The Size 3 basketball has a circumference of 22″ (55.9cm).

What is the radius of basketball ring?

International Rules. The International Basketball Federation official rules specify that the rim has a minimum inside diameter of 450 millimeters and a maximum of 459 millimeters. This approximates to 17.7 to 18 inches, in which case the rim radius is about the same as the NBA standard 9-inch radius.

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What size is a size 6 basketball?

Size 6 28.5” 20 oz Boys ages 12-14. Girls and women ages 12 and up. This is the official size for women’s high school, college, and pro basketball. Size 5 27.5” 17 oz Boys and girls ages 9-11 years old.

What size basketball should a 7 year old use?

Highlights from the new rules and standards include the recommended use of: Smaller basketballs for ages 7-8 (size 5, 27.5” circumference) and ages 9-11 (size 6, 28.5” circumference).

What is the diameter of the ring?

Ring Size Conversion Chart

USA Diameter (mm) Diameter (inches)
15.1 0.594
4-1/2 15.27 0.601
15.28 0.602
15.3 0.602

What size basketball does NBA use?

During NBA and FIBA play men use a Size 7 basketball, with a circumference of 75 centimetres, while women use a Size 6 ball measuring 72.5cm around.

What size basketball do 14 year olds use?

Size 7 Basketball:

For boys, a size 7 basketball should be used once they hit 14-years-old and is the official size used at the high school, college, and professional level. The circumference of the basketball should be 29.5″ and the weight 22 oz.

Why does the WNBA use a smaller ball?

The smaller and lighter basketball was introduced to make women’s basketball more interesting to spectators because female players tend to shoot from longer distances more often than men do, and they generally have more accurate control of the ball when shooting (Logan, 1978).