A Master Barber Shared 6 Reasons Why Some Guys Have Patchy, Thin Beards. Grooming expert Greg Berzinsky explains what might be causing your uneven facial hair—and what you can do about it.

As an added bonus, they can also help patchy or thin beards look fuller. But, to be clear, not all dyes are created equal. What to Consider Permanent or Semi-Permanent.

For example, a long, narrow face will not benefit from a long, thin beard. You want to round out your length with a fuller, wider beard—it's geometry.

To identify the best beard trimmers on the market, we evaluated models on a variety of facial hair. Here are our top picks for 2025 based on testing.