I had a bad experience with an Elsa Peretti ring (single loop). I somehow managed to squeeze the ring when I was driving and had to suddenly break, so the ring was very tight. Took it in to be repaired and when I got it back the ring it was closer to the original size 5 but had lost his quicky loop shape. Sent an email and was told to go back to the store... I didn't bother... Not buying Tiffany again.