Graced with the work of Pauline Napangardi Gallagher, this martingale collar will make a colourful statement on your sighthound's next walk. Our collars are made from cotton canvas that has been wrapped around nylon webbing and come in 4 sizes. Please measure up your dogs neck to ensure you choose the right size for your dog: Sizing (please measure your dog's neck to choose the right size) Medium - 36cm to 42cm (4cm wide) - Larger Whippets Medium/Large - 38cm to 46cm (4cm wide) - Greyhounds Watch our demo video here to fit your dog: