Large, 28cm diameter, 3.5 cm deep fluted stoneware / ceramic pie / flan / tart / quiche baking dish. The interior is very clean, the exterior has some hard baked int the... lovely, rich deep blue glaze, I was given this by a neighbour whose mother was a keen cook and did lots of dinner party entertaining, but sadly I don't, so it needs to go to a good home. No maker's mark though there is a number on the base.