Since countertop ovens that are specially made for pizzas can be costly and impractical, you can also use a basic toaster oven for the same purpose. All you have to do if you have a pizza that is too large to fit in it is break it in half and bake one piece at a time.
You can also stick to purchasing small or single-serve pizzas if you choose to use a toaster oven instead of a pizza oven. It's really not that big of a hassle considering the money you will save. Another benefit you will enjoy is the fact that you can make more than just pizzas in it.