BUILT FOR ADVENTURE: Ruffwear's Hoopie Collar is inspired by natural spaces and built for adventure. The durable, woven fabric construction ensures a lasting connection to your dog. GEAR UP AND GO: The easy-to-use side release buckle means quick on and off so you can spend less time gearing up and more time on the trail. A STRONG CONNECTION: Protect your pup with the Hoopie Collar. The single-piece aluminum ring provides a strong, secure connection to your favorite Ruffwear leash. THOUGHTFUL FEATURES: The Hoopie Collar features a separate Quick Ring for ID tags that's designed to make it easy to add and remove tags. The silicone tag silencer means less jingle. THE RIGHT FIT: Measure your dog's neck where a collar would comfortably lie and select one of the following sizes: Small (11-14 in), Medium (14-20 in), or Large (20-26 in).