Collar
thingiverse
Just a quick tweak on a model for a redditor. 5.5" ID (17.27" circumference). M3x35 bolts for the hinges. M5 bolts for the decorative studs or ring attachment. Can fit rings up to 1/4" thick.
Download Model from thingiverse
With this file you will be able to print Collar 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 Collar.