ZEP-PRO Florida Gators Brown Leather Concho Dog Collar, Medium 100-Percent genuine leather pet collar 2 Decorative silver gun metal concho logos and matching hardware To assure a safe and comfortable fit for your pet, place two fingers between the neck and the measuring device and note the indicated length. Size Medium is 1-3/8-inch wide and fits lengths 17-inch - 21-inch. Officially licensed NCAA team product.Assembled in the USA Collar measures 17 Inch from the part of the buckle where the leather turns to the first hole and measures 21 Inch to the last whole.This gives a range of 17-21 Inch.