These are ceramic, and I believe they are Kasama-yaki. I'm selling them because I don't use them very often. Each plate weighs around 150g, making them very light and easy to use. They look great with Japanese food. Would anyone looking for these like to have them? I've used them a few times after crack prevention treatment, so there's some wear and tear, and there are slight differences in the texture of the plates. They all have slightly different appearances, which gives them a nice feel. *The plate in the third photo has cracks, but I think this is part of its charm. - Color: Dark brown, almost black - Quantity: Set of 5 - Material: Ceramic Outer diameter: Approximately 6.5cm Inner diameter: Approximately 13cm Base: Approximately 11cm They have some depth and are good for side dishes. I think they are not dishwasher and microwave safe. Thank you for looking.