Key Ruler
thingiverse
This mini ruler, fitting in the palm of your hand, can be easily printed out. Obtain it via Shapeways by clicking on their provided link. However, ensure that your printer has been accurately calibrated prior to use.
Download Model from thingiverse
With this file you will be able to print Key Ruler with your 3D printer. Click on the button and save the file on your computer to work, edit or customize your design. You can also find more 3D designs for printers on Key Ruler.