Question

How small in size is the earth when compared to the sun?

Answer 1

The diameter of the Earth is almost `109` times smaller.

Explanation:

This is the sun and the earth.
http://hyperphysics.phy-astr.gsu.edu/hbase/solar/moonscale.html

I would like to share this link to you, this will give you a more simple idea of an earth fitting in to the sun.:
http://www.suntrek.org/sun-as-a-star/sun-and-earth/comparing-size-sun-and-earth.shtml