Pyrography is the art of burning images or designs into wood. These pieces of 1/8" ash have been hand burned, the technique is called back burning. They have also been finished with two coats of polyurethane or tung oil. Lately I've been using tung oil because it works better for me. The two larger pieces measure 12" x 9" and the smaller piece is about 4" x 10", each has a hanger and has been signed by me on the reverse.