These spiked collars are constructed of premium quality bridle leather with careful craftsmanship and special attention to detail. Three rows of rust proof spikes and spots adorn the 2 wide collars, that taper down to 1 at the buckle. A traditional belt buckle closure allows for the perfect fit. Sizes 2W x 18 21 neck circumference 2W x 22 25 neck circumference Colors Black or Brown Collar Sizing Help Measure the circumference of your dog's neck using a cloth measuring tape positioned where his collar sits. The resulting measurement plus 1 2 is your dog's neck size. The collar should be snug with enough room to fit two fingers between your dog's neck and his collar. Tip If you do not have a cloth tape measure, try using a piece of string and then measure the string with a ruler. Note Not recommended for tie out use. Made in the USA.