This collar is made with thick leather padding that feels comfortable and secure around the neck without being too constrictive. It locks in place with a buckle that could have a lock attached. There” s also a half ring in the front, so you can attach a leash and lead your sub around the room or even down the hallway and around the block. This collar fits necks from 16 inch to 18in Warning: This is a NEW item that is not in retail packaging, usually a plain box, wrapped in plastic or a poly bag.