So I've really been enjoying a lot of cheap jewelry on my days off and I really liked these slip-on false nails (it's actually a really fun stim like putting bugles on your fingers and clickety clacking them and tapping them on things) but they keep popping off the metal tabs on the rings and sometimes they're a lil uncomfy so I was trying to find little foam discs to put on the underside of the nails over the metal tab part of the rings that they're superglued to for extra structure and comfort but I can't find any small and thin enough. These ones are kinda small enough but they're still about 2x too thick and all my attempts to trim / thin them have gone poorly. The diameter isn't an issue that's easy enough to trim down but I need thinner ones (and without glitter, a bunch of them are craft supplies with glitter which would be very messy and scratchy). Any thoughts? Here's some reference pics with what I have now and the thumb and pinky nails for scale.
Here's a different direction - try using Goop adhesive to better attach the rings to the nail.
Use more though to cover the ring, and create an insulating layer to make it more comfortable.
When Goop "hardens" it's rubbery, so may be more comfortable than the ring itself, and you can shape it when you apply it. I do this by licking my finger (saliva prevents it sticking, this is an old caulking trick), then shaping with my finger. It cures quickly, so you need to do this immediately.
I use Goop for everything under the sun. It sticks to nearly everything, is very strong, and yet... removeable. It's like extra thick rubber cement.
https://www.amazon.com/goop-adhesive/s?k=goop+adhesive