Nebuchadnezzar's Ring, dimensions: 130.26 x 151.43 x 92.02mm or 5.13 x 5.96 x 3.62in
Scale up or down as needed. However this file is sized to be produced as a replica prop from the comic. It is not meant to be worn on the finger but held in your hand with 4 fingers going through the ring.
I did not check minimum tolerances for creating a wearable ring, it looks ok but depending on ring size, might be too thin... If you prefer something you can wear, let me know and I can size it and make any needed changes for you.
File is 250k
If you needed any help let me know.