This Ole Miss Dog Collar is approximately 1 in. wide, adjustable, and available in five sizes. To find your dog's perfect fit: measure your dog around the top of the neck directly behind the ears. This measurement corresponds directly to the size of the collar in closed position. X-Small fits 10" - 14"; Small fits 12" - 17"; Medium fits 15" - 25"; Large fits 18" - 30"; X-Large fits 21" - 37". The collar has an easy on and off black snap closure, with large silver ring leaving plenty of room for attaching dog tags or a leash. Made in the USA. Toy dog not included.