This is a vintage race used right foot shoe heat protector called a “Blister Resistor” made by Tarheel Gasket and Seals, Harrisburg North Carolina. Looks to have been through a few races with all the wear. If it were a shoe size I would say around 11. This came out of a race parts auction in the Mooresville NC area back in the late 1990’s. I don’t know the team or driver. Free Shipping to USA addresses only. Ships to USA addresses only. Thank You.