Glo-Shine Universal Elastic Adjustable Sport Armband Strap for All Models IPO with Silicone or Leather Case with Armband Slots (Black) The straps are 1.5 inches wide and 14 inches long when measured flat (end to end),Remember 14" is the flat length not circumference,You need about an inch to fold back in itself for the 'hook'. Hook and loop reusable fastening wrap strap with plastic buckle end Made of a durable elastic with a closure,Elastic stretches to fit any bicep, calf, etc A durably safe & effective solution,Perfect for keeping your machine secure while running, dancing, or working out. This adjustable armband suit for many sizes and different types of silicone cases and Arm Bags. it also can be used in daily life from securing items on a bike to holding tools together the possibilities are endless.