Customizable Ruler

thingiverse

One ruler to rule them all (Or something like that.) With it, you can create rulers and scales for a wide variety of purposes. The most obvious being a regular 30cm/12in school ruler (school_ruler.stl is attached if you want that), but you can do pretty much anything you can imagine: LEGO units, drafting scales, etc. Also, you can alter the counting direction and number orientation, so you can use this for all sorts of jigs and tools. See depth_gauge.stl for one example.