* Size of the Sun: The Sun's radius is about 695,000 kilometers (432,000 miles).

* Size of the Solar System: There's no single "edge" to the solar system, as it's defined by the influence of the Sun's gravity. However, we can use the orbit of Neptune, the outermost planet, as a rough estimate. Neptune's average distance from the Sun is about 4.5 billion kilometers (2.8 billion miles).

Calculation:

1. Approximate radius of the Solar System: Assume Neptune's orbit is roughly the "radius" of the solar system for this calculation. This means the solar system's radius is about 4.5 billion kilometers.

2. Ratio of Solar System size to Sun size: (4.5 billion km) / (695,000 km) ≈ 6470

3. Orders of magnitude: The solar system is about 6470 times larger than the Sun. This is roughly three orders of magnitude larger (10^3 is about 1000, so 6470 is closer to 10^4, or 10,000).

Important Note: This is a very rough estimate. The actual size of the solar system is a matter of debate, and some definitions extend far beyond Neptune's orbit.