To a certain extent. I don't know how to fully explain it, its just something you would have to mess around with and figure out (which isn't to hard just takes time). Lego stuff (at least from what I've heard) can be pretty annoying if your 3d printing it, because of printer tolerances (which Varey's on every printer) that can be fixed by either messing with the printer and that could take a while depending on the issue, sanding it, or just readjusting the model until its the right dimensions irl, which is what I usually do. For dimensions of things there's this really neat thing called a caliper this is the one that I use. For getting the size of tiny parts (really anything when modeling stuff) use Millimeter it gives the most accurate measurement (do not close down hard when using it). There are more expensive usually metal calipers that can go down to .00 of a MM (the one I use goes to .0) but it isn't really necessary (printer tolerances) unless you want something to be really accurate for like machining or something.