How Mice Can Squeeze Into Your Home

Mouse looking up
Mice can squeeze into holes about 1/4-inch wide.

By: Matthew Campbell

Dr. Bobby Corrigan, Urban Rodentologist and Entomologist, indicated recently at our fall training seminar that if a #2 pencil can fit into a hole or crack, so can a mouse. That’s because they have collapsible skeletons, right?

Wrong, but that is a common misnomer. And it’s easy to believe when you consider how small a pencil is (about 1/4-inch). So how do they do it?

RELATED: Mice Myths Vs. Facts

As burrowing animals, mice are designed to squeeze into and live in tight spaces. One large example of this is their small size. The fur on a mouse makes it appear larger than it really is, but if you were to shave off all of its fur, then you’d see exactly how tiny they are.

Along with their size, mice have long, narrow bodies and are equipped with strong legs. To top it off, they don’t have collar bones. Just imagine all the holes you could squeeze through if you didn’t have collar bones.

The only limitation a mouse has is its skull. All of this adds up to one fact: if a mouse can squeeze its head through a hole, the rest of its body can fit.

RELATED:  Why Mice are MORE Than Just a Nuissance

To keep rodents out of your home, don’t underestimate the size of holes and cracks you see around the outside of your home or in your basement. If you’re unsure what to look for or what to do, partner with a pest management company like Modern Pest Services. Our pest management professionals are trained to spot rodent conducive areas around your home as well the tiny crevices into which mice and rats can squeeze.


Every season brings a new threat from pests. Be prepared. Contact Modern Pest Services for a FREE QUOTE. Our HomeCare Green Program provides year-round pest protection for 60 common pests – including mice!  In addition, Modern provides Wildlife Control Services.  Call today! 1-800-323-7378.