The 16-inch pizza from the Marco’s pizza franchise makes 12 whole pieces. If a serving is one slice, a 16-inch pizza will serve 12 people. The number of people this pizza can serve depends on how much each individual consumes.
Six people can only be fed by a large 16-inch pizza if each individual consumes two slices. You can ask for the slices of pizza at pizzerias to be cut in half. This means that in order to create more pizza slices—24 half-slices in the case of a 12-slice pizza—they make a few additional cuts. This makes it possible to eat more pizza.