SIZE: XXS: thigh circumference 12-14 joint circumference 8-11 ankle circumference 4-6 leg height 13 XS: thigh circumference 17-20, joint circumference 11-13, foot mouth circumference 7-10, leg height 16 S: thigh circumference 22-25, joint circumference 13-16, foot mouth circumference 10-14, leg height 20 M: Thigh girth 29-32 joint girth 17-20 foot girth 13-16 leg height 25 L: thigh circumference 36-39, joint circumference 22-25, foot mouth circumference 16-19, leg height 30 Material: Neoprene PAIN RELIEF: reduces pain caused by cruciate ligament injuries, osteoarthritis and kneecap problems by increasing the joint's temperature helping to reduce the inflammation. FAST RECOVERY: optimal joint temperature increases blood circulation, improves Oxygene delivery, increases performance for a faster recovery. VETERINARIAN PREMIUM QUALITY: our knee brace is designed and manufactured to provide superior support and comfort without compromising the dog's mobility. The High Performance Neoprene offers enhanced elasticity for a better adaptation to the dog leg. Some dogs have a fallen hip and the upper belt may slide back and fall off.