eSource Optics Santa Claus Rainbowindow is embossed with a micro-faceted holographic surface. Approx. 10 1/2" X 7 3/4" Heavy plastic coated paper board with Holographic lens. The cut crystal prism designs diffract the sunlight to create patterns of rainbows on walls, ceilings and floors. Each eSource Optics Santa Claus Rainbowindow comes with a vinyl rubber suction cup attached for easy hanging. Have fun coloring your Christmas!