I found this one for a dollar. It seems big enough, what do you think? Any bigger and it would be in the way. Also to the side is his soaking dish which he uses. I put some stone in so it isn't too deep and he can get out easily. It is hot and sunny today so I have him outside.
Looks good, just add a whole lot more substrate in the pot so he can dig into it and feel hidden. Or bury the pot down to the bottom of the enclosure so that the substrate fills up part of it.