INTERMEDIATE SIZE: This 28.5" basketball is ideal for girls age 12 and up, and boys age 12-13. EXTENDED DURABLITY: An internal pressure-lock bladder improves long-term durability and air retention to keep the ball inflated. ALL-COURT PERFORMANCE: A durable rubber cover makes this ball suitable for indoor and outdoor play. ULTIMATE GRIP: Wilson's signature Total Grip Technology provides enhanced softness and grip so more players can palm the ball ENHANCED CONTROL: Deeper channels between the panels of the ball allow for more grip points and better ball control when dribbling and shooting.