This superior quality foam board from West Design is rigid, sturdy and easy to cut – making it highly versatile and ideal for mounting, as backing material for prints, making models and framing flat artwork. This polystyrene board, from trusted brand Westfoam, is covered with acid-free paper for a smoothly finished surface. At 5mm thick it is rigid and reliable without being bulky. There are 8 different sizes available, so you are sure to find the perfect one to suit your needs. The board comes in multi-packs of 10 to 25 sheets, depending on the size selected. - Surface texture: Smooth - Acid free: Yes - Product dimensions: 101.6 x 76.2 x 0.5cm (30 x 40 inches) - Page size: 30 x 40 inches - Brand: West Design - Sub Brand: Westfoam - Surface pattern: Plain - Thickness: 5mm - Colour: White - Rigidity: Rigid - Main material: Polystyrene - Used for: Mounting prints, as a backing material, modelling, framing - Number of pieces: 25