Last night, my wife needed a circle template for an art project she was doing. This took about 15 minutes to make in total, from design to finished product. And that is why 3D printing is awesome.
The largest hole is 4cm diameter and they decrease in diameter by 0.5cm to a minimum size of 0.5cm.
If anyone is interested, I could take a stab at parametrizing this in OpenSCAD.
The numbers don't really print at my bot's resolution, but they might for you!