Order of Size – Largest to smallest
Jupiter - 88,700 miles (142,800 km) in diameter
Saturn - 74,898 miles (120,536 km) in diameter
Uranus - 31,690 miles (51,118 km) in diameter
Neptune - 30,775 miles (49,528 km) in diameter
Earth - 7,926 miles (12,756 km) in diameter
Venus - 7,521 miles (12,104 km) in diameter
Mars - 4,222 miles (6790 km) in diameter
Mercury - 3,031 miles (4,878km) in diameter
Pluto - 1,413 miles (2274 km) in diameter
Also 'Sedna' a new planet discovered, but no information as yet.
I'm leaving Pluto in the list even though it has been declassified, just because we're used to it.
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