These armbands are 3.75"(9ms) deep and have a black velcro fastening which gives 4 "(8cms) of adjustment. This price is for the standard, adult size arm band fitting 11"(28cms) - 16"(41cms) diameter arms which is suitable for average sized men or women. Larger sizes are available on request. They are made from heavy weight crepe fabric bonded to a navy blue drill fabric sandwiching a thin layer of foam, which gives a firm, medium weight armband. The edges are finished with black cotton binding.