How Big is a 12-inch Pizza?

A 12-inch pizza is medium-sized big. A medium pizza has a diameter of 11.81 inches to 12 inches, containing 113.04 square inches of pizza.

However, pizza sizes are not universally uniform. Some brands have their own sizing. Locally made pizzas have theirs, too. So, a 12-inch medium-sized pizza is more like an approximation to aim for when you’re making your own pizza.

Read on to find out more.

How Big is a 12-inch Pizza?

A 12-inch pizza is a medium-sized pizza.

Pizza sizes generally come in 5 categories: personal, small, medium, large, and extra-large.


Personal sizes are the smallest pizza you can order. In some countries like the Philippines, it’s also called a “solo” pizza because it’s usually good for only 1 person unless that person still shares it with another, eating less of it.

Personal pizzas are usually 7 inches in diameter and contain 38.5 square inches of pizza.

Many vie for making the smallest pizza in the world, based on the many YouTube and TikTok videos that come up when you search for this feat. A January 30, 2021 Facebook video shows Wood Fire London’s creation made from 3 grams of dough, 1 olive slice, 1/4 slice of mushroom, and 2g. of mozzarella.

Amazon’s Alexa says the smallest pizza in the world was made by Mario at One Pie Over the Moon in Chicago in 1983. He claims it was only 0.005 calories. It was so small you couldn’t see it. Yeah, right.


Small-sized pizzas have 10 inches in diameter and contain 50 inches to 78.5 square inches of pizza.

This size sees the most variation, from 8 inches to 10 inches wide. It usually contains 4 slices, good for 1 adult or 2 children.


Medium-sized pizzas have a diameter of between 11.81 inches to 12 inches, containing 113.04 square inches of pizza.

They usually contain 6 slices, feeding 2 adults or 3 children. Of course, you can always have it — or any pizza size for that matter — cut into more or fewer slices.


Large pizzas are usually 2 inches larger than medium pizzas. They have a diameter of 14 inches, containing 153.9 inches of pizza.

They are usually served in 8 to 10 slices, good for 3 to 5 people. Based on the general observation that an adult will usually eat 2 to 3 slices of pizza, a large pizza can feed 3 adults or 4 children.

Extra Large

Extra-large pizzas start at 2 inches bigger than large pizzas. They have a diameter of at least 16 inches, containing 201.1 square inches of pizza.

They are usually cut into 12 slices, serving 3 adults and 5 children. There are 16-inch and 18-inch extra-large pizzas, too, serving more people.

The world’s largest pizza as listed in the Guinness Book of World Records contained 13,580 square feet of pizza, which is equivalent to around one-third of an American football field.

It was made in Rome, Italy on December 13, 2012, by Dovilio Nardi, Marco Nardi, Mateo Nardi, Andrea Mannochi, and Mateo Giannotte of NIPfood. They named it “Ottavia” after the Roman emperor. It was 100% gluten-free!

large 12 inch pizza

How Big is a Large Pizza?

A large pizza is typically 14 inches in diameter, containing 153.9 inches of pizza.

A pizza can be big, or a pizza can be long.

The world’s longest pizza measures 6,333 feet and 3.60 inches. It was jointly made on June 10, 2017, in Fontana California by, Venice Bakery, Orlando Foods, At-Pac, Sysco, TFX Non-Stick, Capstone Scaffold Services, SoCal Gas, Tony Gemignani, Giulio Adriani, and John Arena (all in the USA) and Italforni (Italy).

It was made from 17,700 pounds of dough, 5,000 pounds of tomato sauce, and 3,900 pounds of mozzarella cheese. Over 100 people made it in over 54 hours, at 40 hours of preparation time, and 14 hours of multiple rounds of baking. The people who made it ate it themselves, with leftovers donated to several local area charities.

How Many Slices Are in a Large Pizza?

There are usually 8 to 10 slices in a large pizza, feeding 3 to 5 people. Domino’s Pizza has 12 slices, though, serving 4 to 6 people.

Speaking of pizza slices, Americans love pizza so much that the United States eats 350 slices of pizza every second! According to the National Association of Pizza Operators (NAPO), Americans eat 100 acres of pizza every day. Of those that eat pizza, 93% eat at least once a month. There are over 74,000 pizzerias in the USA.

3 Pizza Fun Facts

Speaking of pizza in general, here are 3 interesting facts:

Russian cosmonaut Yuri Usachov was the first person to receive pizza delivery in outer space. In 2001, the Russian Space Agency was paid more than a million dollars to deliver a six-inch pizza to the International Space Station.

The Louie XIII is the world’s most expensive pizza, costing $12,000, created by Renato Viola. It’s made from the most refined flour and takes 72 hours to prepare. Toppings can be picked from 3 types of caviar (Oscietra Royal Prestige, Kaspia Oscietra Royal Classic from the Iranian coast, and Kaspia Beluga), the finest lobster from Norway, and 7 types of cheese. It is served with champagne. You can order it from Manoosh Pizzeria in Enmore or Marrickville in New South Wales, Australia.

Superbowl Sunday is the biggest day of the year for pizza deliveries in the United States. According to the American Pizza Community, around 12.5 million pizzas are sold on Superbowl Sunday.

Nick Spieth