Durable PU (Faux) leather collar with nickel-plated hardware 5 adjustment holes,2inch wide double layer Faux Leather Collars Size: Small Size Fits Neck 15-18 inches Medium Size Fits Neck 17-20 inches Large Size Fits Neck 19-22 inches X-Large Size Fits Neck 21-24 inches Nickel-plated hardware and heavy duty D-ring to help protect its neck Strong and durable high quality PU (Faux) leather. Light, elegant and not stiff Material: Faux Leather 100% Quality Guarantee, Brand new leather dog collar Studded spikes Studs cool design as the pictures show 2inch Wide, 5 holes adjustable; Small size for 2 inch wide, 20 inch long (5*51CM) Neck 15-18 inch Medium size for 2 inch wide, 22 inch long (5*56CM) Neck 17-20 inch Large size for 2 inch wide, 24 inch long (5*61CM) Neck 19-22 inch X-Large size for 2 inch wide, 26 inch long (5*66CM) Neck 21-24 inch Note: Before you order,Be sure your dog's neck is suitable for this size (That's very important). Package Included: 1 x dog collar