This is a set of two oval plates by Yoshiyuki Kato. I purchased these at a solo exhibition by Utsuwa Chidori. Approximately 29 x 19.5 cm. While I haven't used them many times, they have aged and developed a nice patina. I'm selling them because I no longer cook. Currently, plates of this size cost around 20,000 yen each, so I think this is a good deal.