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. Refer to the product video and follow the measurement instructions to select the correct size. Size chart is available in the images. PAIN RELIEF: Helps reduce pain associated with cruciate ligament injuries, osteoarthritis, and kneecap issues by increasing joint temperature and reducing inflammation. FAST RECOVERY: Optimal joint temperature promotes blood circulation, enhances oxygen delivery, and supports improved performance for faster recovery. VETERINARIAN PREMIUM QUALITY: Designed and manufactured to provide superior support and comfort without restricting mobility. High-performance neoprene offers enhanced elasticity for a better fit. Note: For dogs with hip instability, the upper belt may shift or slip. KNEE BRACE CONSTRUCTION: Made with 2mm neoprene, fully flexible material that provides light compression, promotes blood circulation, and supports the recovery process.