Trapped by the window glass, this very life-like Mummy wants out. So let him out already if you dare! WOWindow Posters are backlit plastic window posters (34.5″x60″) that light up with inside lights for the surprise of passersby. Just hang them up in 30 seconds and leave your lights on. Our posters will do the rest! Our posters are the highest quality special effect available for thematic window decorating.