Question

If earth was the size of an apple, what would the sun be?

Answer 1

About the size of an SUV.

Explanation:

The diameter ratio of the earth to the sun is about 1:106, so if the earth was an apple, the sun would be 106 times bigger.

Extra Links:
Here is a page on size in space.
This is NASA's Sun info.
Here is Wikipedia's sun article.