White polystyrene extruded foam laminated between two sheets of white paper that feature a faint 1/2 grid to form a lightweight but strong and rigid surface. Ideal for crafts school projects framing mounting displays posters and exhibits. Easy-to-cut sheets have a smooth surface and accept a wide range of media including paints. Sheets are 3/16 thick and measure 22 x 28 . Includes 5 sheets.