two Versions of the Ring Holders, one with 100mm Height, and the other one with 200mm height.
You can use it as Night-Lamp or as decoration on PC-Desk or …
on the backside you can fix the wire with small cable ties and hide.
PLA, no support needed.
Depending on tolerances, if the Ring fits too easy and there is too much space, you can put folded piece of paper to get it stable.
It would be much better to use felt glued in both inner sides as shown in picture below.
The Ring which I used is: https://makerworld.com/en/models/163169?from=search#profileId-205409
From The Lord of the Rings.