A simple hole drawing template with a few defined sizes: 6, 8, 10, 12, 14, 16, 18, 20mm.
The hole sizes are displayed on the template in raised text.
I hope you can find this print useful, too.
To make the print result more interesting, I do a filament colour swap near the end so that the raised text is printed in another colour. The filament colour swap is setup in your slicer software. Setting up the filament colour is easy in PrusaSlicer, other slicers probably, too.
My print is made in PETG 1.75mm 3DFillies white and red filaments, with 0.2mm layer height and 15% infill on a PRUSA I3 MK3S printer.
The author marked this model as their own original creation. Imported from Thingiverse.