A pair of Shark Cufflinks, with swivel clasp and includes free cufflinks box. Dimensions 23mm x 10mm. Sharks are not mammals. Rather, they are a species of fish. Sharks have a skeleton that is entirely composed of cartilage and is equipped with leathery, tough and scale less skin. These skeletons differ greatly from those of the bony fish. Wear these fearsome predators on your shirt sleeve cuff. A great idea for a gift or just treat yourself. Great idea for fishing, wildlife, animal and fish fan.