Started with a 8" x 8" square, 2" deep.  I made an error with my mortise, created it too large, newbie mistake.  So my design choice on the bottom became a mortise within a mortise.  Some chip-out on initial shaping resulted in a 7" diameter bowl.  I think this is the largest non-segmented bowl I've turned since starting this hobby.  Finished with Myland's friction polish.