Made of soft and weather-resistant Teteron Polyester Fabric Fully adjustable Soft on your dog's fur Buckle built with a 4 point lock system for added safety Crisp and bright design Rubber logo protects stitches for longer durability Size Reference: XS - 9 to 13-in neck, 2/5-in wide Small - 12.2 to 17-in neck, 3/5-in wide Medium - 14.5 to 20.8-in neck, 4/5-in wide Large - 17.7 to 27.5-in neck, 1-in wide