Pearl Size: Approximately 8mm Ring Size: No. 11, inner diameter 16.4mm, or No. 11.5, inner diameter 16.6mm Total Weight: 3.2g K18 stamp present *Please note that these measurements are approximate. This is a Showa-era retro K18 pearl ring, reportedly purchased in Nishijin, Kyoto. The ring has fine scratches. I carefully measured the pearl diameter and the inner diameter of the ring, but there may be some error due to amateur measurement. Please understand. There is a K18 stamp inside the ring. It is a vintage pearl ring from the Showa era. It will be protected with cushioning material and sent via anonymous shipping.