What are the dimensions of Washington Monument?

* Base: 55.5 feet (16.9 m)

* Height: 555 feet, 5 1⁄8 inches (169.294 m)

* Thickness of walls at the base: 15 feet (4.6 m)

* Thickness of walls at the top: 3 feet 5 inches (1.04 m)

* Total weight: 90,854 long tons (91,234 metric tons)