Maybe you could put enough hair bands around it to fit the loose gap of the leather loop and slot the leather loop over the hair band part. I don't know how to explain but you understand what I'm trying to say, right? basically using the hair bands as filler and the leather loop as cover.Thanks for the idea! I have some tiny rubber hair bands, that might work. I'm also looking at Etsy for clear ring "noodles"/sizers. It's like a clear plastic thing you can slip around a ring to make it fit better when it's too loose - I may get that and try putting it around the loop on the back side and see if that makes it thick enough to not move anymore.