S: Thigh circumference 29-32cm, joint circumference 17-20cm, foot circumference 13-16cm, leg length 25cm. M: Thigh circumference 36-39cm, joint circumference 22-25cm, foot circumference 16-19cm, leg length 30cm. L: Thigh circumference 43-46cm, joint circumference 27-30cm, foot circumference 19-22cm, leg length 35cm. 360 SUPPORT: Light compression provides stability and improves balance among muscle groups for full support and helps prevent injuries from worsening. View our video and follow the instructions to measure properly and select the correct size. Size chart is available in the images. PAIN RELIEF: Helps reduce pain caused by cruciate ligament injuries, osteoarthritis, and kneecap issues by increasing joint warmth to help reduce inflammation. FAST RECOVERY: Optimal joint warmth increases blood circulation, improves oxygen delivery, enhances performance, and supports faster recovery. VETERINARIAN PREMIUM QUALITY: Designed and manufactured to provide superior support and comfort without limiting mobility. High-performance neoprene offers enhanced elasticity for a better fit. Note: Some dogs may have a hip conformation that causes the upper strap to shift or slip down. NEED STRONGER SUPPORT? This knee brace is made of 2mm neoprene and is fully flexible. Provides light compression and promotes blood circulation to support faster recovery.