How small are fleas?

Fleas are tiny insects, typically measuring only 1/16 to 1/8 of an inch (1.5 to 3 mm) in length. This means they are barely visible to the naked eye and can easily be overlooked.

To give you a better idea of their size, consider these comparisons:

* A flea is about the size of a poppy seed.

* A flea is about the size of the period at the end of this sentence.

Their small size allows them to easily maneuver through fur and feathers and avoid detection by their hosts.