Circular templates for quilters.  All are 3 mm thick.  Print in 2 colours to have the alignment lines standout.  The set includes a 2, 3, 4, 5 and 7 inch diameter circle template.

The lettering is obtained using a negative volume text in Prusa Slicer.  You can see these in the 3mf files.  This screenshot shows the settings that were used for the 4 inch circle.