Yellow Dog Design Inc. is a dye sublimation/heat transfer printing company specializing in the design and manufacture of a unique line of pet collars and leads as well as Equine fashions in their local NC facility. This line is passionate about the product as evidenced by the 5 awesome canines that come to work with us everyday 4 Labs and 1 Dachshund. They are our models and some of the best product testers in the industry. Our martingale collars are made in the U.S.A. of 100% vibrant color-fast polyester with durable hardware and a metal D-ring. Best of all they are washable! Extra Small: 3/8" Width x 10" Neck. Pattern: Americana.