The typical size of a basketball for all ages goes as follows: Boys aged 13 and older: Size 7 ball (29.5 inch circumference, 22 oz., used at the men’s professional level) Boys aged 10-12, Girls aged 11 and older: Size 6 ball (28.5 inch circumference, 20 oz., used at the women’s professional level)
Size : Circumference : Weight : Recommended For: Size 7: 29.5" 22 oz: Men and boys ages 15 and up. This is official size for high school, college, and the pros. 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.
The official size of the basketball used by the NBA is 29.5 inches in circumference. That’s the same size used throughout men’s college and high school basketball leagues.
The circumference of the basketball should be 29.5" and the weight 22 oz. Size 6 Basketball: ...
RULE NO. 1: Court Dimensions – Equipment. The playing court shall be measured and marked as shown in the court (See below) A free throw lane shall be marked at each end of the court with dimensions and markings as shown on the court diagram. All boundary lines are part of the lane; lane space marks and neutral zone marks are not.
Size of Ball: A smaller basketball for the younger age segments is advised due to the size of a child’s hand as well as their developing skill level. A smaller ball allows for better control and success. Size of Court: For 7-8 year-olds, a 50’x 42’ court is contemplated to be a cross-court game on a full-sized basketball court. This dimension is more appropriate for younger children based on their relative size in space.
Size 5 is the standard basketball size for both boys and girls aged 5 - 8 years old. The Size 5 basketball has a circumference of 27.5" (69.5cm). Shop Size 5 Basketballs . SIZE 6 BASKETBALLS FOR AGES 9 - 12 YEARS. Size 6 is the standard basketball size for males aged 9 to 12 years old. The Size 6 basketball has a circumference of 28.5" (72.5cm).
So far the official information available places a Size 7 weight at 20 or 22 ounces. Size 6 weighs 18 to 20 ounces. Size 5 should not go over 17 ounces. Size four is set at 14 ounces, and the mini Size 3 should never weight more than 10 ounces.