This is a fidget ring that you can spin around your finger and works like a bearing. It is minimalistic and pretty much just looks like a normal ring. Most of the other fidget rings on makerworld are big and have patterns on it, but I just wanted a simple one that other people barely notice.
Ringosaurus ring holder from the picture: https://makerworld.com/en/models/60457?from=search#profileId-75081
The tollerences are 0.4mm, so most printers should be able to print this without a problem. I used 0.!6 mm layer height and it turned out great. You may need to put a little bit of lube in but do not put to much because that can actually slow it down.
You can request sizes in the comments for the diameter of the ring. The print profile here fit my finger, but I have small fingers so it might not fit you.
Happy printing!