A beard grows about a millimeter every two or three days, depending on who you are—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 check the trimmer’s ability to function as a shaver, whether for balding or on the neck.
Our testers check how well-made and easy to use any attachments are, and we verify manufacturer claims about battery life and power. We also check in with professional haircutters, especially to verify claims of durability and reliability among brands and models.
Tester Matthew Korfhage has coarse and angry hairs, with a seeming mind of their own. Tester Andrew Williams has a relatively full beard, with straight-growing stubble. We’ve tried to reflect any possible issues—struggling with thick bristles, for instance—in our reviews, so you can be sure of the best possible trim with the least amount of effort. And we might run a blade into a horsehair broom, to test a motor’s power, and its likelihood of bogging down when faced with a thick, full beard.
