Since i wasn't the one that did that part of making the templates I am gonna just have to do a educated guess here.... I believe they were done that way so that you could tape them together and them place them on the foam mat. you would have to angle the pieces as you build the parts.. When I pressed print they appear to be set of U.S. Letter format. I also believe they are done in 4 parts so that they get close to the correct size...