Hand cut in heavy gauge copper then treated with acid to create these beautifully patinaed pieces. Each is different due to the process. Sealed in clear resin. Framed in Michigan barnwood. The Great Lakes piece is available in assorted sizes starting at 5×7 ( also as 4×4 coasters). The atlas image begins in a 12×18 size and is available in larger sizes. Please contact us for custom orders.