PREMIUM QUALITY: Excellent performance for outdoor basketball play but can be used Indoor. Our Premium rubber material, not leather provides an extra strong hold + durability on any outdoor or indoor basketball court. • PERFECT GRIP: Aggressive pebble pattern & deep channels for ultimate grip and control on our 27.5", 28.5" & 29.5" basketballs. • OPTIMAL PRESSURE: Butyl bladder locks in air for optimal ball pressure and shape retention for a consistent bounce throughout your game • SPECS: Size 5 youth basketball 27.5" (Kids, Junior, Girls, Boys) Size 6 womens basketball, wnba official basketball 28.5" - Size 7 mens basketball 29.5". For indoor outdoor, black-top, concrete, practice & playground courts.