chance premium indoor/outdoor basketball - composite leather (sizes: 5 youth, size 6, size 7) (7 men's official - 29.5", sebastian - beige & turquoise) chance the chance premium composite leather indoor/outdoor basketball comes in a variety of styles made for you and delivers excellent performance. an aggressive pebble pattern & deep channels provide ultimate grip and full control. the balls come in a variety of sizes (5 kids & youth 27.5”, 6 women’s official size 28.5”, 7 men’s official size 29.5”), ensuring there is a ball that fits you. our butyl bladder locks in air for optimal ball pressure and shape retention, for a consistent bounce throughout your game (ball comes deflated, air pump and inflation needle not included).