The Zing Design Medium Drawstring Pouch is a drawstring accessory pouch with a color keyed stretch Lycra top hem that allows the drawstring to slide smoothly and cinch tightly. It can be used in a bag for extra padding, worn on a belt through the reinforced web loop, or clipped to a bag, strap or belt using the sewn on plastic snap hook. Because this is a drawstring pouch, the exterior, diameter measurement of 4" will probably translate into room for an item up to 3.125" or less.