20mm calibration cube
thingiverse
This is a 20mm cube that I used to test the scaling accuracy of my printer with a caliper.
Download Model from thingiverse
With this file you will be able to print 20mm calibration cube 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 20mm calibration cube.