Antique The Robinson clay Products Co Akron Ohio Windy City and Flat Iron Stoneware Mug. This piece measures 5 1/2" high and they are 3 1/2" in diameter at the top. The condition of this piece is excellent - no damage. It is marked on the bottom of the mug. If you have any questions please ask. I will combine shipping when possible. California residents pay 9% sales tax. All our sales are as-is unless we make a listing error.