White Styrofoam Ceiling Tile Alfa (Package of 8 Tiles) - Other Sellers call this Bostonian and R01 Each Tile is 50cm x50cm. Each package of 8 covers 21.6 SQFT Easily Glues directly to Popcorn Ceilings, Stucco, Plywood, Sheetrock, Knock-Down Paintable with any water-based paints, metallic or non-metallic. Cuts with razor knife, Adds sound, heat & cold insulation. Looks like real tin or plaster ceiling, depending on the finish.