Half check dog collar. Reflective yarn is woven into the webbing for night time visibility. Rounded contoured plastic components ensure that every ROGZ collar fits snuggly. Helps prevent dogs from backing out of their collar. Size guide: Small is 8-13in and is suitable for Yorkie, Pom, Maltese, Miniature Poodle and Chihuahua dogs, Medium is 10-16in and is suitable for Pug, Scotty, Jack Russel, Maltese Poodle and Terriers, Large is 13-22in and is suitable for Dalmation, Spaniel, Doberman and Boxer dogs, Extra Large is 17-27in and is suitable for Rottweiler, Bouvier, Ridgeback and Labrador dogs.