Ordered these as my engagement ring, even after having it reduced to the smallest size still keeps slipping round my finger. This is due to having enlarged knuckles from arthritis, but very thin fingers either side of the knuckle. I had other ones similar to these and they worked but they had small sharp points that constantly caught in clothing towels ect. These ring sizers fit my ring snuggly and don’t catch on anything. My ring still slips slightly but nowhere near as bad as without them. I might add that I never take any of my good rings off due to my arthritis, and the ring sizers stay put through showering and hand washing. Very happy with them.