The dermestid beetle is a dark brown or black beetle whose elytra feature a wide stripe of smaller, lighter hairs that range from yellow to grey or white in colour. This stripe has six black dots in the centre (three on each elytra) that vary in size and shape. Its head has two short, club-shaped antennae. Two pairs of wings are attached to its thorax. Under its elytra are two functional wings which are used when the beetle takes flight. Males and females have similar appearances and measure between 6 and 9 mm.