Final answer:
The question lacks the necessary context to determine the size of the pizza received. Additional details like the menu or order specifics are essential to provide an accurate answer.
Step-by-step explanation:
The question posted does not provide sufficient information to determine what size pizza will be received. To properly answer this question, additional details are needed such as the restaurant's menu options, specific promotions, or the actual order that was placed. Without this context, it is not possible to accurately determine whether the guest will receive a small, medium, large, or extra large pizza. When ordering a pizza, usually the size of the pizza is directly stated or chosen by selecting one of the listed options.