Peru is the twentieth-largest country in the world, with a total area of approximately 496,224 square miles (1,285,216 square kilometers).
In the world rankings of country size by area, Peru sits just below Iran and Mongolia, and just above Chad and Niger.
In comparison, the United States -- the fourth-largest country in the world -- has a total area of about 3.8 million square miles (9.8 million square kilometers).
You can see a rough visual comparison in the image above.
Compared to US states, Peru is slightly smaller than Alaska but almost twice the size of Texas. Peru is about three times the size of California; the state of New York, meanwhile, would fit into Peru about nine times.