Nice find, good old Carl Sagan.
Not trying to be a oneuper but to contribute:
The Largest Known Star
Celestial Body Radius (km)
Earth: 6378
Moon: 1738
Mercury: 2439
Mars: 3397
Venus: 6052
Neptune: 25,269 (equatorial) 24,340 (polar)
Pluto: 1160
Uranus: 25,559 (equatorial) 24,973 (polar)
Saturn: 60,268 (equatorial) 54,360 (polar) (not including rings)
Jupiter: 71,490 (equatorial) 66,854 (polar)
Sun: 1,392,684
Betelgeuse: 1,323,049,800 km or (950 solar radii)
NML Cygni: 2,297,928,600 km or (1650 solar radii)
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