Iris thickness choice You could opt to have

You could opt to have a full non Euro shank if you prefer

although the gears back there will mean the inscription would have to be small

so 9 is IX (one before ten) or 944 is CMXLIV

This has the best of both worlds

Let the one you love know that your heart beats for them

Iris thickness choice You could opt to haveThe Iris ring has a working mechanical shutter mechanism which reveals a hidden stone. It could optionally hide a laser engraved letter. The tiny shutter vanes with special gear mechanisms were specifically engineered to fit on a ring and are laser cut from aerospace grade titanium. The ring is 9mm wide and the stone is 8mm diameter. It can be a lab created birthstone like this amethyst or can be a clear CZ. Just specify in the Comments section.