XS:8.7-11"(22-28cm).S:10.5-13"(27-33cm).M:11.4-14"(29-6cm).L:14-18"(36-46cm).Our mission is to provide the good quality and a large variety of collars, leashes, harnesses, dog apparel and unique pet products with competetive price.These pet supplies are extreme comfortable, durable, fashionable and personalized designed for your pet.