This recipe is for one 8" pizza that is meant to serve two people. While you can double the crust ingredients and make a larger pizza, it may be easier to make two 8" pizzas instead. The bigger you make the pizza, the harder it is going to be to get on and off the rack after the toppings are on. Now, you can absolutely use a pizza stone for the final baking, but when you go to par bake the crust only, I would line the stone with parchment so you are sure you can easily remove it.