Any size could be made. Etching could also easily be added for the diameters. The materials cut could be steel, aluminum, pastic, fiberglass, etc. The key would be to see how accurate they are. Lasers don't cut perpendicular to the material. There is a small draft angle. Laser also leaves a tiny "nub" where it starts and stops cutting. So there would probably need to be a relief cut into the circle.Customer here....also snooker balls?
I'll measure the ones I took a picture of with precise pin guages, to see how close they are to the diameters I had in the files I sent to the laser cutter. If it looks promising, then can go from there.