DEPTH ILLUSION BOOKMARK The depth illusion bookmark can bring you to the 3-D world as you stare at it! Say good-bye to your old boring bookmark and have fun with the Magical illusions this 3-D bookmark will bring you! hologram bookmarks are 5.5 inches long and almost 2 inches wide. The textureis somewhat coarse. The bookmark are in assorted colors and covered with an illusion of bubbles that seem to grow or shrink depending on how the bookmark is moved. On top is a circular optical illusions.