The file 'Archaeological North Arrow, Survey Arrow, 20 Centimeter 3D Printer Model' is (stl) file type, size is 121.8KB.
A 20 centimeter north arrow scale. The accuracy of the measurement is dependent on your printer and settings. I printed mine in white, masked the surfaces with tape, and sprayed with a flat black spray paint for plastic.
This is not as nice as a professionally made scale, but I think it's pretty ok.
I hope this is useful for you!
20_cm_north_arrow.stl | 471.4KB |