This is a circular disc made from the famous large ginkgo tree at Yugyo-ji Temple in Fujisawa, Kanagawa Prefecture. While the intended use isn't specified, it's likely a coaster or trivet. As stated on the temple's website, the tree is over 500 years old. Yugyo-ji Temple is also famous for being located just past Yokohama Totsuka on the outbound route of the Hakone Ekiden New Year's marathon. Diameter: 12 cm. Thickness: 1.4 cm. (Measured by an amateur.) The box is dirty, but the contents show no particular signs of deterioration. This is the minimum starting price. Thank you for your understanding.