It is all over my feed at the moment!
And the two below from Dear Rose With Love on Etsy
and a search for interchangeable rings on Etsy brings up quite a few
I love the idea in theory, but during the 80s I used to be matchy-matchy and I think I totally put myself off it now. I used to match my big plastic clip-on earrings to my belt, bag and shoes – something like this. I firmly believe the 1980s were the most horrendous years for fashion, so now I avoid coordinating too much. And I thank my lucky stars that there is little photographic evidence of my fashion disasters.