The Shark Fin® Urban Classic collar is a patented design. It has the classic style of a finely stitched leather jacket or wallet. It is made from the finest English bridle leather from Wickett & Craig. The stitching is a heavy bonded nylon that exceeds most durability ratings by other leather collars on the market. The D-rings are positioned behind the main leather body to provide the most secure connection. If properly cared for with the recommended leather care products this collar will last many years. Currently available in 6 sizes and 4 colors. If you don't see the size you need please send us a request for it. Note: This product is a custom-made to order product. Please allow 1-3 weeks for delivery. Click here to review the size guide.