After passing this pizza stone by a few times, my sales rep gave me one of these to try. Good idea on his part! As soon as I used it, I started carrying them in my shops. I was skeptical about the stove-top claim and was happy to be proven wrong when I used my Emile Henry pizza stone to make chapatis on. Totally even heating and truly non-stick - it's a dream product. We sell a lot of them for use on a grill as well. I haven't tried that yet but look forward to it. This one is 14" in diameter.