Comparison of seven-inch and nine-inch pizzas

1, different diameters: the diameter of 7-inch pizza is about17.78 cm; 9-inch pizza is about 22.86 cm in diameter.

2. Different sizes: The area of three 7-inch pizzas is not much different from that of two 9-inch pizzas, but the 9-inch pizza has more fillings and the 9-inch pizza is relatively larger.