Easy to use. Simple to clean. Made with a super strong flex-poly strap, the all-weather Collar is comfortable and functional. It is also dirt and odour resistant, available with a matching leash. MaterialsFlex poly coated webbing strap, zinc alloy buckle, coated carbon steel d-ring. SpecsMeasurement details are provided in the sizing guide below. Small and medium straps are 3/4" wide. Large straps are 1" wide. Care InstructionsHand wash with mild soap and warm water. SizingOat fits both medium and large Collar Size GuideMeasure the circumference of your dog’s neck. Size Neck Strap Width Dog Breed S 20 - 31 cm 2 cm Cocker Spaniel, Jack Russell Terrier, Shih Tzu, Pug, Boston Terrier M 31-38 cm 2 cm Border Collie, Australian Shepherd, Beagle, French Bulldog, Corgi L 38 - 46 cm 2.5 cm Golden Retriever, Pitbull, German Shepherd, Standard Poodle, Labrador Retriever