6 Best Beard Trimmers (2025): Full Beards, Hair, Stubble

A beard grows about a millimeter every two or three days—an eighth of an inch a week, on average. So testing beard trimmers can take a long time.

In general, we test each beard trimmer once a beard has grown out enough for a good trim—using at least two cutting lengths. Weight and balance matters, and so does the blade’s ability to get to the awkward areas around the neck. We…