11”x15” Foam board is lightweight but strong, and can be cut into any shape with clean edges, 3/16Inch thick foam corn board ideal for school project, signboards, picture framing and mounting, 20 pack polystyrene foam sheets white Foamcore Board Features: Made of Acid free materials, easily to cut into shape and resists warping Lightweight yet study white foam board sheet, ideal for posters or presentations Features smooth and rigid surface, works well with pin, markers, paints, adhesives, and fabrics Three layers foam core mat, the polystyrene core covered matte Plastic on both side Multi-function backing boards, perfect for artwork, school project, picture framing, mounting displays and sign boards Foam Sheets Specifications: Foam Boards Size: 11”x15” Thickness: 3/16” Colors: White Features: Smooth Surface, Warp Resistant and Resistant, Acid-free Package Include: 20Pack White Foam Boards