Foam board measures 30" x 20" x 3/16" thick. Easy to cut into clean edges and meets various specifications. Lightweight yet strong and rigid surface, resistant to warping and denting. Acid-free and odorless, safe for kids, toddlers, teens, and students to use at home and in the classroom. This double-sided foam-core board is made with polystyrene extruded foam, laminated between two sheets of paper to form a smooth surface. Colored on one side, it's great for arts, crafts, framing, mounting, displays, presentations, exhibits, posters, school projects, model making, signs, promotions, scrapbooking, and sporting events. Features a smooth matte finish surface and accepts a wide range of media, including paints, chalk, markers, glue, and glitter.