The Strict Leather Premium Leather Locking Collar is the highest quality collar we offer. It is reinforced with three layers of leather and 2.5 inches wide. This heavy duty design provides additional security and weighs 9 oz. Our locking buckle design can be used with or without a lock. Fits necks 13-19 inches. Warning: This is a NEW item that is not in retail packaging, usually a plain box, wrapped in plastic or a poly bag.