This item was passed down to me from my mother (⁠◍⁠•⁠ᴗ⁠•⁠◍⁠)⁠❤ I'm not an expert, so I'm not entirely sure, but the inner diameter is about 17mm, so I believe it's about a size 13 (Japanese size). I think it's quite old, and there's a PM 900 stamp on the inside. Apparently, it's the same as PT 900. My mother bought it at a Tenmaya store a long time ago. The case in the image is also included. I've had it confirmed by a pawn shop. It's a solid platinum piece without any extra diamonds or stones, so it's perfect for those who collect platinum products ❤️ I don't think there are any noticeable scratches or stains, but please refrain from purchasing if you are concerned about minor scratches or are overly sensitive. No returns or exchanges, please, to prevent any swapping. Material... Platinum #PT900 #Platinum #PlatinumRing #PlatinumRing #Stamped #PlatinumProducts #CareerLuck #Pt #GoodLuckCharm #MoneyLuck #PlatinumRing #Genuine #Pt900 #GoodFortune #Unisex #PlatinumAssets #LadiesRing #MensRing #Unisex #LuxuryRing #LuxuryRing Accessories... Box