You may have seen on my Twitter that we had a rather large turtle visit our property a couple of days ago. My guess is that his shell was close to a foot in diameter. Here are a couple of pics.
He looked even bigger when his legs were out and he was walking, but of course he went right into his shell as soon as we came anywhere near.
It's fun to live in a place far enough outside of town that you get to enjoy some different animals. Except for the snakes.