These wooden sock blockers are cut from high quality birch plywood and finished with an environmentally friendly blend of all natural orange oil, linseed oil, tung oil, and bee's wax. They are available in a wide range of sizes to properly match your foot size, making it possible to test a sock's fit. With an extra long leg, our blockers will block calf high socks. The multiple cutouts allow for extra air flow to help your socks dry faster and the integral hook makes for easy hanging.