Alvalley Nylon Slip Lead for Dogs 8mm X 123cm or 5/16in 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 8 mm or 5/16 inch - length 122 cms or 4 feet.