Diameter of Stars and Planets

Planet / Star	Diameter km	Relative to Earth
Mercury	4,880	.4
Mars	6,784	.5
Venus	12,104	.9
Earth	12,756	1
Neptune	49,532	4
Saturn	108,128	8
Jupiter	142,984	11
Sun	1,392,500	109
Sirius	2,506,500	197
Pollux	6,962,500	545
Rigel	86,335,000	6,768
Beteigeuze	905,125,000	70,956
Antares	1,108,430,000	86,894
My Cephei	3,481,250,000	272,910
W Cephei	3,676,200,000	288,194