Add dimension to your creativitythese boards are ideal for creating artwork or completing school projects. Designed for durability, lightweight foam display boards feature a polystyrene memory core that expands back into shape after cutting for a consistent thickness from edge to edge. Each foam board features smooth surfaces that are perfect for pencils, markers, paints, adhesives & fabrics. Strong enough to resist crushing & denting. Polystyrene. Art Board Type: Tack Display Board; Material(s): Polystyrene Core; Color(s): White Surface / White Core; Board Size (W x H): 20" x 30".