In most leagues 28.5 cm
umm 13 year old girls should probabl use a 28 to 28.5...
You would use size 6
Typically for that age girls use the womens size or 28.5.
9-11 year old people use 28.5 size ball
I'm 12. It's true that a 29.5 size basketball would make his game improve, but that would be a training ball for him because a training ball is a size bigger basketball then the one recommended for someone. 28.5 is the right size. I keep 2, a outdoor training ball (29.5) and a indoor regular ball (28.5).
28.5 basketball If u start young you'll be a great basketball player Good luck God bless y'all
Regular size
28.5 mm ball.Gurjot Singh Sodhi
A 14 year old male basketball player would use an official size ball. There are 2 official sizes for men, 29.5 or 30 inches. For a 14 year old girl, it would be an official ball for women which measures 28.5 inches.
22G 1"
Most games (i.e. High School and Adult) are played with a size 5 ball, but a size 4 ball is also suitable, especially for an 8 year old
34 inch marucci