I just have a 5x7 frame, as that's the largest size I do, but...there's a glass cutter in town that does custom sizes *and* custom thickness, so I...may have a slight advantage. Heh. It'll cost more, but I'll get a nice, heavy piece of glass instead of the thinner one. I plan on getting two: one to fit in my contact frame and the other larger, about 8x10, to use when I want to print 5x7 edge to edge