how big is the pentagon

The Pentagon is a huge building with about 6.5 million square feet (around 600,000 square meters) of floor space. It covers a land area of approximately 29 acres (about 12 hectares), including a central courtyard of 5 acres. The building is five stories tall above ground, with two basement levels, and features a unique five-sided shape with 17.5 miles (28 km) of corridors inside. It serves as the headquarters of the U.S. Department of Defense and accommodates around 25,000 employees.