Matted 5x7 and Matted 8x10 photos have a Navy Blue top mat and the inner mat varies depending on the photo colors. The Matted 5x7 fits a standard 8x10 frame, and the Matted 8x10 fits a standard 11x14 frame.
Metal prints are created by dye-sublimation in a heat press where the inks are infused onto specially-coated aluminum and sealed with a gemlike UV coating. They are water, scratch & UV resistant and the archival quality is out of this world (think many decades).