The Zeus line of dog collars, leashes, and harnesses offer a complete range of products in classic and fashion-fresh colors for everyday walks and for basic training needs. The Zeus Martingale Nylon Dog Collar provides gentle control without the choking effect of a traditional choke collar; they are gentler and more humane than a traditional choke collar. As well, it can also be used as a conventional collar by simple attaching the leash to the collar's o-ring instead. Featuring a quick-release duo-tone snap buckle, Zeus martingale nylon dog collars are available in 6 dynamic colors and 3 sizes (medium, large, and extra-large). Complementary-colored leashes are also available (sold separately). Zeus Martingale Nylon Dog Collar - Medium, Denim Blue Key Features : Gentler and more humane than traditional choke collars Can also be used as a traditional collar Quick-release duo-tone plastic snap buckle Available in 6 colors Available in 3 sizes (medium, large, and extra-large) Complementary-colored leashes also available (sold separately) Size: 1.5 cm x 38 cm-45 cm (1/2in x 15in-18in)