This one is made of unglazed stonewear (glazed on the outside for ease of cleaning) and costs around £12 for the medium which seems a perfect size to me. They do a smaller one at about a tenner and a larger one for about £14.
What can I say - I think it is a thing of absolute beauty. I could quite happily just look at it. The weight, feel, balance, everything about it screams quality and feels such a pleasure to use. Grinding spices is a joy now not an annoying chore. The pouring spout is great for accurately tipping the herbs/spices where you want them. I just love this kitchen item.
I have not been contacted in any way by Mason Cash - this is an honest opinion of an item I have bought myself.