This item has been stored at my parents' house for a long time. Although it has not been used, upon inspection, there is some blackening as shown in photo 7. Other plates also have small black spots, but it is unclear if they are original to the piece. The maple leaf patterns may use real maple leaves, and each one is different. The wooden box is deteriorated. Thank you. Approximately 12.2cm each in length and width. Height: approximately 2.5cm