For high school basketball, the standard size of the basketball is a Size 7. This ball has a circumference of 29.5 inches (75 cm) and weighs approximately 22 ounces (624 grams). It is used for both boys’ and girls’ varsity games in high school, as the regulation size is consistent across both genders at this level.
However, for girls’ basketball in some cases, especially at the junior or younger high school levels, a Size 6 basketball might be used. Size 6 has a circumference of 28.5 inches (72 cm) and weighs around 20 ounces (567 grams). This size is generally more suited for younger players or those who may need a slightly smaller ball for better handling.
