SCP Foundation Ring
cults3d
Due to popular demand on Reddit, here it is :) The ring inner diameter is 21 mm. Feel free to scale up or down to model to make it fit your finger.
Download Model from cults3d
With this file you will be able to print SCP Foundation Ring with your 3D printer. Click on the button and save the file on your computer to work, edit or customize your design. You can also find more 3D designs for printers on SCP Foundation Ring.