Most large pizzeria pizzas, measuring 14 to 16 inches in diameter, feed approximately four to eight people, depending on how many slices each person eats. Large pizzas typically contain eight to 12 triangular slices or 10 to 12 square slices. read more
If you are feeding men or young teens, then plan one large per 2 people, otherwise plan for the large pizza to feed 3 people. I hate to run out of pizza, so I would probably go with 2 people per pizza. read more
On average there are: 6 slices per small (8-10") pizza, 8 slices per 12 inch pizza (medium), 10 slices on a large (14") pizza and 12 slices on an extra-large (16-18") pizza. You should confirm the number of slices before ordering because this will vary between pizza providers. read more