Had a piece of plexiglass cut recently and noticed the leftover scraps in the back room of the hardware. My friendly glass cutter gave them to me for a much reduced price. Had them cut to 2 1/2, 3 and so on up to 8 inches wide by 24 inches long. Also had him cut squares for me in even sizes - used the 24 X 24 last week and what a joy they were. Just marked the sizes on them with permanent marker and my darling man used his drill press to make hanging holes for me. Much easier than adjusting the bifocals to those crazy little lines on the commercial rulers :-)