Spalding NBA Zi/O Excel Basketball Zi/o composite leather cover looks and feels genuine Full ball pebbling provides soft, tacky feel Measures 29.5 inches, official nba ball weight Indoor/outdoor composite leather basketball Recommended inflation is 8 PSI Indoor/outdoor composite leather basketball Deep channel design for better dribble control Foam backing under the full-ball pebbling for precise ball handling Official NBA size and weight Official play size of 29.5 inches