Back on Track Therapeutic Dog Rear Leg/Hock Brace (Pair) Small 7.25-Inch Length, 4 to 6.25 Inches Top Width, 3 to 4.75-Inches Bottom Width with 4 Adjustable Velcro Straps This Therapeutic Dog Hock Brace is constructed from a neoprene outer shell and Welltex fabric infused with ceramic particles State-of-the-art therapy product, clinically proven to reduce pain and chronic inflammation The infrared warmth can help relax your dog's muscles and relieve joint pain,The therapeutic Dog Hock Brace is ideal for both injury prevention and recovery The four attached Velcro strips let you quickly fasten and remove The Dog Hock Brace, as well as adjust its snugness Refer the sizing chart to find the correct fit.