Designed by a professional engineer in her spare time, this no-nonsense ruler/combination square allows you to quickly measure objects for lazy gridfinity-ification. This model focuses on practicality, minimal filament usage, and ease of manufacturing. A reinforcement in the center ensures the ruler is stays stiff and rigid even when printing with PETG (for you nerds out there, there's simply material concentrated mostly at peak bending stresses). 

One side measures in 42 mm increments for bases, and other side measures in 7 mm increments for height. 

When printing in multi-material, you can set the purge multiplier to 0, as the embossing on the type is actually enough volume for a color change. Efficiency!