Stubble to full beard: the trimmers that give a clean, even cut every time

Trim on a clean, dry beard. Start with a longer guard than you think you need and work down. Trim with the grain first, then against it for a closer cut. Define the neckline about one inch above your Adam's apple.

For a clean shave on other days, see our best electric shavers, and keep nose and ear hair tidy with a pick from our best nose hair trimmers.

• Length settings. More, smaller steps mean more control.
• Battery life. Look for an hour or more and fast charging.
• Waterproofing. Washable trimmers are easier to clean.
• Blades. Stainless or self-sharpening blades stay sharp longer.

How we chose: we compared specs, materials, ingredients and price, and read owner and expert feedback. We didn't test these products ourselves. Prices are approximate and change often, so check the current price before you buy.

• Trimming a wet beard. Wet hair looks longer and can lead to cutting too short. Trim when dry.
• Starting with the shortest guard. You can always go shorter, never longer. Start long and step down.
• Shaving the neckline too high. A neckline at the jaw makes the beard look smaller. Keep it about a finger or two above the Adam's apple.
• Skipping maintenance. Hair buildup and dry blades make trimmers pull. Brush and oil the blades regularly.
• Ignoring the cheek line. A natural, slightly curved cheek line usually looks better than a hard, straight edge.

Good lighting and a hand mirror for the sides and neck make a bigger difference than any feature on the trimmer. Work slowly near the edges and do the outline last, after the bulk trimming is done.

Between trims, a few drops of beard oil keep the hair soft and the skin underneath from getting itchy and flaky.

If you want one tool for beard, hair, nose and body, the Philips Norelco Multigroom 7000 is the best value. If you keep your beard at a precise length, the fine dial on the Braun Series 7 Beard Trimmer makes it easy. For a trimmer that lasts for years, choose the metal-bodied Wahl Stainless Steel Lithium Ion 2.0+, and if your beard is very dense, the Panasonic ER-GB80 cuts through without tugging.

Whatever you choose, clean the blades after each trim and replace guards if they start to wobble. A loose guard is the most common cause of an accidental bald patch.

Trimmers also make easy, useful gifts; see our best gifts for men for more ideas.

If you shave fully on some days, keep a separate shaver for that job. Trimmers are built for length control, not a close shave.