you schould use size 5
A 7-year old boy should use the Junior International Size 5 basketball. The basketball has a circumference between 27.25 to 27.75 inches.
An 8 year old boy will typically use a normal fully sized basketball. These children may use smaller balls as well.
28.5 inch diameter
A youth ball, about 27.5 inches.
One size up from a ten year old boy. Or it can be one size down from a twelve year old.
Average waist size for a 17 year old boy?
There is no standard size clothing for a 6 year old boy. The size of clothing that a 6 year old boy will wear is determined by his weight and height.
28.5 basketball If u start young you'll be a great basketball player Good luck God bless y'all
Average Waist size for a 5 year old boy is 21"