This is a set of two cafe au lait bowls by Ryota Aoki. I purchased them a few years ago and used them 2-3 times, then stored them in the cupboard. I'm selling them because I don't use them. The black glaze is cool and stylish. I'm not sure, but I think the glaze contains iron. The inside bottom looks rusty, but it was like that when I bought them. For fans of Ryota Aoki, or those looking for unique cafe au lait bowls, how about these? They are very thin and light. These have been owned by someone and are used. Please check the photos and understand that they are used before purchasing. Also, I will reuse packing materials for shipping. Thank you for your understanding. Please feel free to ask if you have any questions. ◎Diameter: approx. 10cm x Height: approx. 6cm