Really Liked Kelly Egan"s spiral ornament (https://www.thingiverse.com/thing:210741) but had a hard time adding ribbon/thread for hanging, so I added a "loop". I left the hole in case the loop breaks for whatever reason - this way you still have the option to hang them the way Kelly designed it in the event of said breakage.
tree_hanger.stl | 491.6KB |