Looks like a typical small (10") to me. You might not be used to seeing them, since most delivery chains (in the US, at least) make it more economical to buy a large (14").
...It never ceases to amaze me what sort of conversations can come up on pictures of naked people. :)
In my town, a large is nearly two feet, and there's an XL the size of a small coffee table. Seems weird that a place almost opposite New York (where I'd expect huge pizzas) would have abnormally large pies.
