I specifically made this to fit the arm of my couch that is ~128mm wide. It prints in two pieced with no supports. I glued mine together and its pretty stable and snug. I printed this with 4 wall loops, out of tough PLA because it is what I had on hand and it is plenty strong enough.
If you print just the top I suppose you could affix it to anything you'd like.
HAPPY PRINTING!
The author marked this model as their own original creation.