NPR:

One 16-inch pizza has roughly the same area as 1.3 14-inch pizzas or 4 8-inch pizzas.

To get the same amount of pizza you get in a 16-inch pizza, you’d have to spend an extra $2.35 on 14-inch pizzas, or an extra $16.41 on 8-inch pizzas.

I always get the Large pizza if only because I’m a pig. Nice to know I’m getting better value to boot.