The Glow Tuff Dog Collar is designed for durability and comfort. This collar measures 1 1/2 inches wide by 24 inches long, fitting dogs with a neck size between 14 to 21 inches. It is crafted from thick, poly-coated nylon and features raised edges for added strength. The collar is equipped with a sturdy, nickel-plated buckle, a large D-ring for easy leash attachment. Sizing and Fit: Please measure your dog's neck carefully to ensure the correct collar size. The Glow Tuff collar is designed for medium-sized dogs with neck sizes ranging from 14 to 21 inches. Not suitable for small/medium dogs