Our tough, durable 8mm nylon mountain collar is easy on dogs with long hair. This rope collar does not snag on the dogs fur. The 8mm collar is about the size of a pencil. This collar is available in the following colors Red Stripe, Blue Stripe, Black Stripe and Pink Stripe. For correct size please measure your dogs neck and add at least 2 inches. The size of this collar includes the rings from end to end. The 8mm choke collar is available in Sizes 12, 14, 16, 18 and 20.