Designed a ring for the Prusa Printers flash contest. My goal was to make something nerdy yet simple/elegant, at which I think I succeeded!
The inner diameter (ID) is created at a fixed 20mm. If you measure your own finger, you can scale it up/down easily to fit your size.
I have made a total of 3 rings that make for a cool retro set, you can find them here:
Playstation: https://www.prusaprinters.org/prints/133103-playstation-ring
Nintendo: https://www.prusaprinters.org/prints/133197-nintendo-ring
SEGA: https://www.prusaprinters.org/prints/133901-sega-ring-dreamcast
The author hasn't provided the model origin yet.