Every plaything needs a quality collar! The Noir Black leather collar is made of nubuck leather and has a strong brass 'O' Ring for style and attaching leash, 6 hole buckle fastening system, Pad-lockable buckle prong and padded for extra comfort during long play times. Adjustable circumference: 34-54cm / 13.5-21.6 inches. Collar width: 5.4cm/2.13. Strap width: 2.4cm/0.94. O-ring diameter: 3.3cm/1.29