Well done!
I think plexiglass (the stuff rulers are made out of) is our Perspex. My partner is in the glass trade, so he gets it cheap (it's VERY expensive to buy) and he cuts it himself on a saw bench.
A light sand on the ends to take off the sharp edge, and voila!
I use a permanent marker to write on them what size they are, and a couple have other lines as well. They can also be scratched with a sharp pointy something (compass works well, scalpel, etc).