Diameter 11cm. Please check the size in the 4th image. This item has been stored at home for a long time. The box and tissue paper show signs of aging, but I believe the plates themselves are in good condition. The product information sticker is faded and difficult to read, but it says "Kano Shikki Co., Ltd." Shipping may be via Rakuraku Mercari Bin. No claims or returns accepted.