Alvalley Nylon Martingale Show Lead for Dogs 4mm X 42in x 10in collar 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 4mm or 1/8inch - length of collar 10inch or 26cms - length of lead 107cms or 42inch.