The Sun is not smaller than the Earth. In fact, the Sun is significantly larger than the Earth. Here's a comparison:

* Sun's diameter: 1.39 million kilometers (865,000 miles)

* Earth's diameter: 12,742 kilometers (7,926 miles)

This means the Sun is about 109 times wider than the Earth! It's so large that you could fit over 1 million Earths inside it!

It's possible you might have gotten confused because the Sun appears much smaller than the Earth in the sky. This is because the Sun is much further away from us than the Earth.