USED AS ARMBAND OR WRISTBAND – adjustable strap can be optionally used as either armband or wristband. Wristband & armband 2 in 1: one 10.47 inches belt for wrist wearing, one 14.06 inches belt for arm using, they are long enough for any size of hand. Strong elastic, washable breathable.two velcro hooks connect even more tightly for a smaller size. not recommended for slim wrist. Super flexible strap to fit arm up to 16”. Adjustable velcro fastenings to fit any arm size from 8-16”.