These armbands are 3.75"(9ms) deep and have a velcro fastening which gives 5"(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 grey coloured foam backing which gives a firm but light weight armband. The edges are finished with black cotton binding.