Available in either small (adjustable to 18 inches in circumference), medium (up to 20 inches) or large (up to 22 inches), this unisex leather bondage collar is 3.5 inches wide and is not fitted with the usual metal buckle fastenings. Instead, a solid metal bracket goes through any of the 4 back fitting slits in the leather that you choose. This is then secured in place with a lock and key. A D-Ring is also attached. Two spare keys are included.