Probably the most comfortable knob ever IMO.
2 Styles Round/Flat top
2 Different sizes standard or sort (S)
Round Standard - 34.16mm tall
Round Short (S) - 26.30mm tall
Flat Standard - 29.34mm tall
Flat Short (S) - 20.20mm tall
The flat knobs will be easier to print as it can be printed upside down
The rounded ones may need a bit of clean up.