Constructed of polyurethane leather, this new official 12-panel design is the official size and weight.With a butyl bladder, this ball has been nylon wound, and the deep pebble and scuff-resistant outer cover means that there is fantastic grip as well as durability throughout game time.This is a great value ball for personal use, whether it is indoor or outside in the garden or drive.Official Basketball sizing Chart:Size 7 " male aged 14+Size 6 " female aged 14+Size 6 " male & female aged 11-14Size 5 " key stage two age 7-11Size 3 " key stage one age 5-7