Dog Leather Collar Martingale Lurcher Borzoi Greyhound Whippet Dog Soft Leather Padded Sizes from Extra Small to Extra Large in 7 Colours (7&rdquo;-9&rdquo; Dog Neck. Ref 3468, Orange) Size XXS reference 3468. Width in the widest point 2. Will fit 7-9 dog neck. Size XS reference 3469. Width in the widest point 2. Will fit 9-11 dog neck. Size S reference 3470. Width in the widest point 2. Will fit 10-14 dog neck. Size M reference 3471. Width in the widest point 2. Will fit 13-16 dog neck. Size L reference 3472. Width in the widest point 3. Will fit 15-18 dog neck.