Basketball Sizing & Age Group Guide: Official Size 7 (Size: 29.5"; Age: Men 15+), Official Size 6 (Size: 28.5"; Age: Women, Boys & Girls 12-14), Junior Size 5 (Size: 27.5"; Age: Boys & Girls 12 and under), Mini Size 3 & Micro Mini Size 1 (Fun and/or Promotional Use)