I bought the 2mm gold couple rings, my boyfriend and I have been using the rings 24/7 for 4 months now. I have it on while I shower and while i eat, 1) Zero tarnish 2) Zero scratches 3) Just purely convenient and good looking for an everyday promise ring. I would also like to add that the customer service is amazing too. I bought the L/M, but turned out we required the M/S, and Miso by Sonia agreed to exchange the rings immediately. Thank you for the seamless experience!