The Sun's radius is about 109 times bigger than the Earth's radius.

Here's a breakdown:

* Earth's radius: Approximately 6,371 kilometers (3,959 miles)

* Sun's radius: Approximately 695,000 kilometers (432,000 miles)

To find out how many times bigger the Sun's radius is, we divide the Sun's radius by the Earth's radius:

695,000 km / 6,371 km ≈ 109