Needed a finger loop to save the phone from drops!
I used either a keychain or flame joined rope(plastics only!) for the loop.
the piece is 30mm wide at base and 8.5mm high. the hole is 5mm diameter.
i used double sided tape(the thicker type) to secure to the phone case

i printed at 100% infill since its a small part but im certain it will work with less.