This is an extremely restrictive leather posture collar It has a contoured front so it sits high up on the neck and just below the jawline to prevent the wearer turning their head It has 3 D rings two on the side and one in front so the wearer can be chained up At he back it has a strong double buckle The tightest closed measurement is 14 and can go up to 19 A great way to keep him or her in their place