20 by 20 mm star ring
thingiverse
The terminology for naming a ring can be perplexing and varied, so I'll use the KISS approach by stating its measurements instead of calling it sized T, which may vary across sources. Check out this design on Tinkercad (https://tinkercad.com/things/bL5Rbh4EwGq-star-ring) and learn about ring sizes for your perfect fit from Thingiverse (http://www.thingiverse.com/thing:12689). P.S., this creation was made using Thingiverse's design (http://www.thingiverse.com/thing:284644) and Tinkercad.
Download Model from thingiverse
With this file you will be able to print 20 by 20 mm star 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 20 by 20 mm star ring.