how big is a 16 inch pizza

The size of A1 paper is 594 mm by 841 mm, which is approximately 59.4 cm by 84.1 cm or 23.4 inches by 33.1 inches. It has a surface area of 0.5 square meters (5,000 cm² or about 5.38 square feet). A1 is the second largest size in the A series paper sizes, half the size of A0 and double the size of A2. This size is commonly used for posters, architectural drawings, and large-format advertising materials.