4°C Ring. The case in the photos is for display purposes only; the ring will be packaged with bubble wrap for shipping. It's a size 7. I've added photos for your confirmation. ⭕️ Free Shipping ⭕️ Only one item available. 100 yen discount for purchases combined with other items that can be shipped together. ⭐️ Although not specifically designed as a pinky ring, it's a size 7, so it can be used as one. Shipped with Mercari's insured shipping. I've worn it about 5 times since I bought it a few years ago. I've mostly kept it in its case, but since it's K10 gold, there may be some discoloration from aging, rust, and minor scratches from contact with other accessories in the case, which are difficult to see in the photos. I believe there are no noticeable scratches or stains when worn, but please purchase if you don't mind minor imperfections, as this is a subjective assessment. There is no certificate of authenticity, so I don't know the product number, but as you can see in the photos, there is a 4°C marking on the inside. I haven't added any personal markings. (*^^*) Free cleaning service is available at 4°C stores nationwide using a dedicated cleaning machine. This is possible even without a warranty, as stated on the 4°C official website. I think it's a good deal. Returns and exchanges are not accepted to prevent switching. If you have any other questions, please comment before purchasing (*^^*) If you would like additional packaging, it will be available for an extra fee. Please comment before purchasing. Search 4°C Ring 4°C Half Diamond Ring 4°C Half Diamond Ring