My quilting teacher said to go to an Ace Hardware store for a 6 inch piece of plexiglass, which they would cut from scraps. I was fussy cutting some fabric for a quilt and not sure if I would use one again. After buying templates that cost a lot, I visited my Ace store, got a 6 inch piece of plexiglass cut, and went home. It was accurate and cost 25 cents! It was the thicker plexiglass as well and the edges were smooth. I did draw diagonals on it so I could find the center. So try Ace, they were great!