These armbands are 3.75"(9ms) deep and have a velcro fastening which gives 5"(8cms) of adjustment. They are made from heavy weight cotton/polyester drill fabric and have cotton bound edges. The armbands can adjust 5 inches in size when worn. Where possible they will have same colour binding but where not possible they will have black binding currently the colours which will have black binding are yellow and orange. They feature the words worksite testing person printed in your choice of colour.