I am selling only the ring that came with a Louis Vuitton necklace. I'm not sure if it was manufactured after 2021, but the ring has no model number or serial number. The size is estimated to be around size 15-17. I have added a photo comparing the rings. The thin ring on the right is size 17. The item is a wide ring, so I think it's better to use size 15 as a guide. I did not measure it correctly because it was something I received from someone else, so these are approximate measurements. Thank you. I will ship it immediately after purchase.