There are 16 slices of pizza in an extra-large pizza from Round Table Pizza. However, the number of slices in an extra large pizza varies by restaurant.
Even though it is a relatively new food to the country, pizza is so beloved in the United States that more than 3 billion pizzas are sold in the country each year, which adds up to about $37 billion in revenue. On average, every person in North America eats about 23 pounds of pizza each year. In its simplest form, pizza is made of bread, tomato sauce and cheese, but from there the options are almost limitless.