20"x30" White Foam Board Dry Erase Polystyrene extruded foam laminated between two sheets of paper to form a lightweight but strong and rigid surface. Ideal for crafts, school projects, framing, mounting, displays and exhibits. It has a smooth surface that can accept a wide range of media, including paints. Sheets are easy to cut and are warp and dent resistant. Pacon® Foam Board is 3/16" thick and available with a dry erase finish.