I just turned the bowl this weekend. It is Myrtle Wood from Oregon. The diameter is 10 3/4". Coincidentally, the piece right behind it showed up in the mail today, and the circle in the middle is the same diameter (and thickness). The wood behind is a piece of Maple Burl and the burl goes all the way through! A little denatured alcohol was put on the surface to see how it would 'pop' after finishing. It is completely dry and ready to turn!