32 x 40 inch (81.3 x 101.6 cm) foamboard, 3/16ths inch (4.8 mm) thick, clay-coated black board on both sides. Our regular black foamboard is now ACID-FREE at NO EXTRA CHARGE! This is a full case of 25 sheets. Save big by buying in full cases. (At this time, we only sell foam board in case quantities.) Made in USA. THIS ITEM QUALIFIES FOR FREE SHIPPING IN LOWER 48 US STATES! See shipping page for details.