I trace the size I need on another piece of paper. I use a marker that will write on waxed paper (not all of them do) and just tape pieces together until I have a piece of paper large enough. Then I put all the markings on the traced pieces, and the size, from the original pattern. I only sew for grand kids these days and since they are all so close in age, I often need to use two or three of the sizes on the pattern. When I'm done using the patterns I made I just fold them all together and put a post-it with the size and use a straight pin through the layers to keep them separate from the other sizes.