These are totally adjustable cuffs with sensual lace-up design. For use on wrists or ankles. Velcro style and lace closures. Soft and plushy on one side with designer fabric on the other. Heavy-duty metal chain with universal clasp. Non-tarnishing, nickel-free. Polyester (fabric, lining, ribbon, Velcro(R)) Nickel-Free Iron (chain, D-rings, rivets) Nickel-Free Alloy (clips) PP (webbing). Cuffs adjust up to 11"/28 cm. 8"/20.25 cm detachable chain.