Leather Rhinestones Bling Dog Harness, Medium, Black, Argentinean Leather (Malibu) For Medium breeds. Neck: 10.5" - 20.5". Chest: 20"-27" The best in quality, comfort, style, design and price. 100% genuine Argentinean leather harnesses with rhinestones. For Medium breeds weighing upto 35-40 lbs. - Neck sizes: 10 inch - 20 inch. Chest sizes: 20 inch - 27 inch Fully adjustable, with a quick release snap to make putting on and removing much easier. A felt lining along the breast plate prevents agitation and irritation.