Every now and then i get in a position where i can't use my normal squares because it's either a tight place or simply a small object. Made a quick square that would fit my needs perfectly and problem solved. I really like that little guy, it finds more use than my actual woodworking squares.

If you don't have AMS and want numbers and millimeter lines to be different color, then add pause at layer #26 and swap out the filament.

Print Settings:

Layer height: 0.20

Walls: 3

Infill: 10%

NOTE: Make sure your line width is 0.42 because if it's not it will not make the mm lines.