Country Brook Design Oh My Dog Premium Dog Collar - Medium 80% polyester/10% plastic/10% nickel Made in USA Collar fits 13in - 16in neck. There are no standard sizes for dog collars. Please be sure to measure your dog's neck for correct size. Measure around your dog's neck (with string or tape measure) snugly where you want the collar to lay. If you have any questions or problems with sizes please give us a call before ordering. 256-974-0700 Breed Recommendation: Greyhound, French Bulldog, or Collie Made in U.S.A. with top quality hardware Features a metal side release buckle with a mirror finish