S: thigh circumference 29-32 cm, joint circumference 17-20 cm, foot circumference 13-16 cm, leg length 25 cm. M: thigh circumference 36-39 cm, joint circumference 22-25 cm, foot circumference 16-19 cm, leg length 30 cm. L: thigh circumference 43-46 cm, joint circumference 27-30 cm, foot circumference 19-22 cm, leg length 35 cm. 360 SUPPORT: The light compression guarantees stability and improves the balance between muscle groups for complete support and prevents injuries from developing into more serious conditions. Watch our VIDEO and measure accordingly of our instructions to select the correct size. You can find the size chart in the images. PAIN RELIEF: Reduces pain caused by cruciate ligament injuries, osteoarthritis and kneecap problems by increasing the temperature of the joint, which helps reduce inflammation. RAPID RECOVERY: Optimal joint temperature increases blood circulation, improves oxygen delivery, increases performance for faster recovery. Premium Veterinary Quality: Our knee brace is designed and manufactured to provide superior support and comfort without compromising the dog's mobility. High performance neoprene provides improved stretch for better fit on the dog's leg. Some dogs have a dropped hip and the top belt may slip back and fall. NEED FOR STRONGER SUPPORT The MIMIGO knee brace is made of a 2mm neoprene and it is totally flexible. Gives light compression, increases blood circulation, which speeds up the recovery process.