Europa: 1561 km radius
Earth: 6371 km radius
The diameter is twice the radius.
The length of the Moon's diameter is about 27% of the Earth's.
The diameter of Uranus is approximately three times that of the Earth.
The Sun's diameter is about 109 times the Earth's diameter.
Saturn is one of the gassy planets and is huge compared to the size of Earth. Saturn has a diameter of 120,536km much bigger than Earth. Earth, however only has a diameter of 12,756km. If you were smart enough you would work out Saturn is 9.45 x Earth.
Neptune's diameter is about four times larger than Earth's, measuring approximately 49,244 kilometers compared to Earth's diameter of about 12,742 kilometers.
Mars is only about half the diameter of Earth.
The diameter of Venus is about 95% of the diameter of the Earth. Venus is 12103.6 kilometers in diameter from any reference. (Its slow spin does not produce a bulge.) Earth has an equatorial diameter of about 12756.2 kilometers and a polar diameter of about 12713.6 kilometers.
Jupiter is the largest planet in the solar system and its diameter is 142,984 kilometres compared to Earth's which is 12,756 kilometres.
Uranus is several times larger than the Earth. Its diameter is 29297 miles, compared to the Earth's diameter of 8000 miles
the sun's diameter is about 110 times greater than the diameter of our earth.
The Sun's diameter is about 108 times the size of Earth's. (The Sun has a diameter of about 865,000 miles compared to Earth at 8000 miles.)
The diameter of Mercury is 4,879 kilometers, which is about 38 percent of Earth's diameter. Earth is about three times the size of Mercury.