The total length of the pocket is { 9 in | 23 cm } and the width is { 3 in | 7.6 cm }. The top opening is { 2.25 in | 5.7 cm } and will accommodate lights up to { 8 in | 20 cm } in length. It can hold any of the various handheld style backup lights sold by Dive Gear Express. This nylon mesh pocket features a Velcro® closure with a plastic D-ring pull tab, is designed to drain easily and is abrasion and tear resistant. A Nylon stiffener helps the pocket retain it's form for ease of replacing the light back in the pocket.