This is made of ceramic, and I believe it's Kasama-yaki. I'm selling it because I don't use it much. It looks great with Japanese food. Would anyone looking for this like to have it? I've used it a few times after crack prevention treatment, but there are some differences in the texture of the plates. - Color: Dark brown, almost black - Quantity: Set of 5 - Material: Ceramic Outer diameter: Approximately 6.5cm Inner diameter: Approximately 13cm Bottom: Approximately 11cm It has some depth and is also good as a side plate. I think it's not dishwasher and microwave safe. Thank you for looking.