The Earth is approximately four times the size of the Moon, not "double four times" or "eight times".

Here's a breakdown:

* Diameter: The Earth's diameter is about 12,742 kilometers (7,926 miles), while the Moon's diameter is about 3,474 kilometers (2,159 miles).

* Volume: The Earth's volume is roughly 49 times greater than the Moon's volume.

Therefore, the Earth is approximately four times larger than the Moon in terms of diameter, but its volume is significantly greater (about 49 times).