Circle Template
thingiverse
These Are circles. Sorry, they are imperial sizes. I hate that as much as you do. Files are named by the ID size. The OD is 1/2" larger. If you print them all, they nest and snap together (poorly: at least as printed on my machine) I use them to draw circles while making things.
Download Model from thingiverse
With this file you will be able to print Circle Template 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 Circle Template.