We love these cool copper coasters by a State of Copper. About 4×4, the copper image is under clear polyurethane so will not change color. Stunning designs made in Michigan. Please indicate your choice or choices in the notes on your order 1. Great Lakes, 2. The U.P., 3 State of Michigan, 4. Mackinac Bridge. The images shown are samples. Each coaster is different in terms of patina. Yours will be beautiful! Coasters are 38.00each.