Our Trail Hound Collars are designed with the adventurous canine in mind. We use new quality materials to maximize and enhance every outdoor adventure. Featuring: 1.5 inch triple stitched nylon webbing, Zinc alloy quick release buckle and lock, Welded steel D-ring attachment. Collars are adjustable.SIZING: Small: 13-16 inch (1 inch width) Medium: 16-20 inch (1.5 inch width) Large: 20-23 inch (1.5 inch width) Fabric Content - Nylon