A handy drawing tool that you can keep in your wallet!

The Small/Regular version features:

• 90º square tool (55 x 55 mm)
• Metric ruler from 0 cm to 5 cm (in 5 mm intervals)
• Protractor from 0º to 90º (in 5º intervals)
• Quarter circle templates from 0 cm to 5 cm (in 5 mm intervals)
• Thickness gauge from 0.5 mm to 1.5 mm (in 0.5 mm intervals)
• Wallet friendly size (55 x 55 x 1.5 mm)
• End-of-spool kind of print (2/3/4 g)

I've also included a Large variant that has the size of a full credit card (85 x 55 x 1.5 mm) and a similar Medium variant that is more stylish.

The Regular versions include a 0.5 mm thick corner aligning aid, but I've also created Flat versions that are a little bit less functional but also thinner (1.0 mm).

The recommended layer height is 0.1 mm. I provide these GCODES, these GCODES adding Ironing on the top surfaces, and a Fast printing GCODES with higher layer thickness (0.2/0.25 mm).

Finally, I provide the parametric OpenScad file, so you can easily personalize the design.