The Archaeological North Arrow is used in photographs to show both orientation as well as metric scale (10 cm, 10 one cm, and 1 five cm) in unit excavations. In other words, this is used to show the size and orientations of archaeological photographs.
v1 had an arrow tip 4 cm in length, so v2 has corrected to the proper 5cm.
The accuracy of the scale is within 0.3 mm and with some printer calibration, you can probably improve the accuracy.

Prusa

I3 MK3S

No

No

0.15

20%

I'd recommend ABS or PETG but anything will work. It's managed to endure over two years of fieldwork without any issues.