Diameter: 11.8cm Height: 6.7cm Set of 4 These are bowls made of solid wood, hollowed out and coated with inner vermilion lacquer. Being natural wood, they are not microwave or dishwasher safe! The workshop is unknown as these are dead stock. Some tape was attached, so I wiped it off with sticker remover spray. I think it's clean, but I apologize if any adhesive remains.