Pre-cut foam board for smaller projects that don't need a full size sheet! The smooth, bright white surface has a slightly glossy finish that easily accepts markers, crayons, paints and adhesives. Lightweight and rigid, foam board cuts easily with a utility knife or razor. Perfect for mounting photographs and artwork, 3D modeling, small signage, and scaled down arts and crafts! Boards measure 16" x 20" with 3/16" (5mm) thick, dense white polystyrene foam core and white on back of sheet.