An eight-inch pizza is 20.32 cm. The diameter of an eight-inch pizza is about 20.32 cm, which is equivalent to the size of a larger dish or a rice cooker at home. If there is an eight-inch pizza, you can directly compare the size of these daily necessities, so that you can intuitively understand the size of the pizza. 8-inch to 10-inch pizza is suitable for 2 to 3 people. Pizza is a kind of scone which originated in Italy. It consists of bread, tomato sauce, cheese and various ingredients. It is a popular fast food with different flavors, including classic Italian pizza, cheese pizza, seafood pizza and so on. Its history can be traced back to17th century and originated in Naples, Italy.