Durable And Stylish Neoprene Collar With High Quality Printed Nylon Webbing Outer, And Soft, Flexible Neoprene On Inside For The Dog'S Comfort. These Neoprene Collars Are Available To Suit A Variety Of Sizes: - Small = Neck Sizes 30Cm - 42Cm (Suitable For Small Dogs Such As Dachshunds, Chihuahuas) - Medium = Neck Sizes 34Cm - 47Cm (Suitable For Medium Dogs Such As Cocker Spaniels And Kelpies) - Large = Neck Sizes 43Cm - 64Cm (Suitable For Large Dogs Such As Golden Retrievers, Labradors, Australian Bulldogs)