Oppo: Elasticated Shin & Thigh Support OP2010. Designed to fit the upper portion of the tibia and calf. Provides compression and support over the calf and shin. Warms shin increasing blood circulation. Minimise chances of future injuries. Size: Measure around the mid-section of the shin, while in a standing position: 30.8-33.7cm Small, 34.3-37.5 Medium, 38.1-41.3cm Large, 41.9-45.7cm X Large.