Bacteria are significantly smaller than human cells. Here's a breakdown:

* Human cells typically range from 10 to 100 micrometers in diameter.

* Bacteria are generally 1 to 10 micrometers in diameter.

This means a human cell can be 10 to 100 times larger than a bacterium!

For example:

* A typical red blood cell is about 7 micrometers in diameter.

* A common bacterium like *E. coli* is about 2 micrometers in diameter.

This size difference is why we need powerful microscopes to see bacteria, while human cells are large enough to be visible under a light microscope.