Is this a real question? If you are seriously asking about the relative size of the Earth, Sun, and Moon, here is a graphic depicting the sizes of each:
Notice that the moon is much smaller than the earth, the earth is much smaller than Jupiter and Jupiter is much much smaller than the sun. If you want more information, look up Arcturus, a nearby star that is much much bigger than our sun.
Notice that the moon is much smaller than the earth, the earth is much smaller than Jupiter and Jupiter is much much smaller than the sun. If you want more information, look up Arcturus, a nearby star that is much much bigger than our sun.