Overview
This is a simple arrow to be used as a sign on walls and doors.
I ended up designing this after needing a quick, no-nonsense directional sign more than once: pointing visitors toward a workshop, marking which way a hallway continues, or labeling a cable run so I would remember which connector goes where. Rather than buy a pack of generic arrow stickers, it took less time to model a clean, minimal arrow shape and print it in whatever color matched the wall or the object it was labeling.
The shape is deliberately plain: a flat, single-color arrow with no fine detail to fail on the print bed, so it comes out clean even on a printer that has not been freshly calibrated. It lies flat during printing and needs no supports, which keeps it fast and cheap to produce even if you need several at once for a full set of signs around a room or a building floor.
Because the model lives on OnShape as a parametric part, you are not stuck with my exact proportions. You can open the document and adjust the length, the width, or the angle of the arrowhead to fit your own signage, then export your own STL without having to model an arrow from scratch.
It pairs naturally with the rest of the door and wayfinding signs in this collection, the toilet door signs among them, whenever a plain directional arrow is enough on its own, without needing a full pictogram.
Because there is no text baked into the shape, the same arrow works regardless of language, and you can print a whole batch in one color and reuse them anywhere a direction needs pointing out, rather than designing a new sign for every single location.
It is proof that not every useful print needs to be complicated to design or interesting to look at.
Sometimes the most useful thing in a whole library of models is the plainest one.
Simple, reusable, and done in minutes.
I keep coming back to this one specifically because it has no strong opinion about what it is for: print it in whatever color matches the wall it is going on, and it will look at home pointing toward a workshop door just as easily as marking a cable route inside an enclosure.
Download
The model is free to download and print, licensed under the Standard Digital File License.