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.Polystyrene extruded foam laminated between two sheets of paper to form a lightweight but strong and rigid surface. Details:Assortment Colors; five sheets of white and one sheet each of Black, Blue, Green, Red and Yellow20" x 30" x 3/16" 10 count