M: Thigh circumference 29-32cm, joint circumference 17-20cm, foot circumference 13-16cm, leg length 25cm. L: Thigh circumference 33-36cm, joint circumference 21-24cm, foot circumference 16-19cm, leg length 30cm. XL: Thigh circumference 37-42cm, joint circumference 25-28cm, foot circumference 19-22cm, leg length 35cm. 360 SUPPORT: the light compression guarantees stability and improves balance among the muscle groups for a full support and avoids injuries from turning into more serious conditions. Look at our VIDEO and measure based on 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 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. NEED A STRONGER SUPPORT The MIMIGO Knee Brace is made of a 2 mm neoprene and it is totally flexible. Gives a light compression, increases the blood circulation making the recovery process faster. About Shipping: All items will be shipped within 3 business days after the payment is received. Most times you will receive them within 8-12 days then. The specific delivery time is depend on circumstances.Any questions, please feel free to contact us During the shopping process, if you have any questions, please feel free to consult us, we will reply you within 24 hours, wish you a happy shopping Thanks for your cooperation and we'll make you feel satisfied.