How large of an opening can mice squeeze through?

Mice are remarkably flexible and can squeeze through very small openings. An opening as small as 1/4 inch is sufficient for a mouse to enter. This ability to fit through tight spaces is due to their small and streamlined body structure, which allows them to compress themselves as needed. It is important to recognize this fact when considering pest control measures, as ensuring that openings larger than this size are sealed is vital for effective prevention. Larger openings, while they may allow mice to enter, are not as critical to focus on as those that are 1/4 inch or smaller, since those are the sizes where successful entry is guaranteed. Understanding this size can help in assessing and fortifying potential entry points in structures to keep mice out.