Mark your place with this handy bookmark. This model is only 0.5mm thin and will result in a one layer print unless your layer height is < 0.25mm. Enjoy! If you like this project and would like to learn about making things with 3D printers, laser engravers and other cool maker-tech, check out my new book "The Makerspace Workbench" from Maker Media! Don't forget to follow me on Twitter!