Saturn,
which is the second largest planet in the solar system, is
120,536 kilometers in diameter. Because of its size,
Saturn is classified as a gas giant. The diameter at its
equator is about 74,898 miles (120,536 kilometers).
Since the planet has no solid surface, its diameter is
measured at a level equal to the pressure at sea level on
Earth.
Saturn's diameter is more than nine times larger than
Earth's.