These products are handmade, created from faux leather/vegan leather. All metal accessories are made of stainless steel (spikes, rivets, D-rings, chain, lobster claw). Chokers sizes are adjustable: X Small: 12-14 inches Small: 14-16 inches Medium: 16-18 inches Large: 18-20 inches Cuff sizes are adjustable: Small: 6-7.5 inches Medium: 7.5-9 inches