Although the size was what I was looking for, the unglazed top rim of the sink really shows when it is under-mounted.  My granite guy had to grind and grind the rim down to try to minimize how much of the unglazed porcelain shows, all the way around.  It's mounted, and still look pretty bad.  Will try to redo the caulking in a way to hid it.  Beware of the rim!