Alvalley Nylon Martingale Show Lead for Dogs 6mm 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 6mm or 1/4inch - length collar 10inch or 26cms - length lead 107cms or 42inch.