Alvalley Nylon Martingale Show Lead for Dogs 2mm X 8in x 4ft Made with the finest nylon for a smooth and soft feel to the touch. The ends of the leash are stitched and then covered with our traditional hand braided leather. The softess leash you will ever find. Thickness 2 mm or 1/16 inch - length collar 8 inch or 20 cms - length lead 122 cms or 4 feet.