The purchase date is unknown. After purchase, it was stored unused. The dishes were stored wrapped in paper, but there were stains due to long-term storage. I wiped them with a wet wipe, and they came off cleanly. The outer box is a little dirty. This is a single set for sale, but I have another set available, so please comment if you would like to purchase it. Cup: Diameter: approx. 5.5cm, Height: approx. 10cm Saucer: Diameter: approx. 10cm