This is the Sweet Lil Whales Coupler Dog Leash - Size Medium - 3/4 inch wide and 12 to 20 inches long from Yellow Dog Design, made right here in the USA. Keep your cat in the latest fashion with this stylish, functional and durable cat collar. SIZING: The dog coupler leash adjusts in length to allow for easy use. The size selected is typically matched with the width of collar the dogs wear. However, sizing up may sometimes be desirable for dogs that pull. If you are shopping for designer, affordable dog/pet collars, then look no further. These durable, guaranteed to last dog collars have no rough edges, no threads to fray or break, no problem going in the wash, and no stress getting them on or off your dogs.