ring size sets EU, America, UK

There are a couple of ring size sets; the advantages of this one:

• size and shape of typical rings, rounded inside
• no tabs etc, so you can wear a ring for hours to check if it feels comfortable
• each ring has it's ring size imprinted in 4 ways: diameter (d), European size (E), North American size (A) and UK size
• 4 sets available, so you get round values in your preferred system:
  • diameters from 15mm to 22.5mm in steps on 0.5mm (16 pcs)
  • European sizes from 50 to 69 (20 pcs)
  • North American sizes from 4 to 13.5 in steps of 0.5 (½) (20 pcs)
  • UK sizes from G to Z (20 pcs)
• Embossed version (as in photo) or multicolor version (rendered image; see printing instructions) available

Disadvantages: They need more storage space than thin sets and there's no nice storage option. I just keep them on a piece of thin rope, closed by a knot.

Notes: 

• The model has exactly the noted inner diameter, but if printing extrudes a bit too much, the resulting diameter gets a bit smaller. I first measured about 0.15mm less than intended, but just slightly scratching the inside with the caliper itself brought it to pretty much the exact diameter. I recommend checking the actual diameter with a caliper, and if too small, using a bit of sand paper.
• The UK sizes seem to vary a bit within various online resources. I used the British Standard 6820:1987 (BSI).

Printing: 0.4mm nozzle, 0.2mm layer height, normal settings.
If you want to use the dual color option, you need a multicolor setup, then import (or drag'n'drop) both files (e.g. EU and EU text) at the same time and agree to load these files as single object with multiple parts. You can then change the color of the text part.