I am selling this ring because I purchased it last year but haven't used it. It is a K18 ring, not plated. The size is approximately size 21. For reference, it weighs about 1g on a household scale. I have added images (photos 4 and 5) where you can confirm the K18 hallmark. I will also include the accessory pouch that came with the purchase. Please consider it a bonus. Search tags: #kihei (gold chain) #18k (18 karat gold)