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Straight answers on shavers, trimmers and clippers.

How to choose, use and look after the tools men groom with, and how to get the beard or haircut each one is built for. Written for US readers, with every source linked.

Clipper guard lengths

The hair each guard leaves, drawn to scale

#1 to #8
Clipper guard numbers and the hair length they leave
GuardInchesMillimeters
#11/83
#21/46
#33/810
#41/213
#55/816
#63/419
#77/822
#8125
Standard guards on most US home clippers. Lengths vary a little by brand, so check the number on your own guard.
guides published
14
topics covered
5
kinds of tool: shavers, trimmers, clippers, groomers
4
paid places in our rankings
0

New on Grooming Nova

The latest guides, newest first.

All guides
  1. Styles, Shapes & Length Guides

    Trim Beard Wet or Dry? Dry Wins (One Wet Exception)

Which tool does which job

Most grooming mistakes start with the wrong tool. Here is what each one is built for.

  • Electric shaver

    Cuts hair at skin level for a clean-shaven face. Foil shavers move straight across; rotary heads turn in circles to follow the jaw.

    What it leaves
    No length: a close shave
    Guides on electric shavers
  • Beard trimmer

    Keeps a beard or stubble at one even length with an adjustable guard, and cleans up the cheek and neck lines.

    What it leaves
    A set length, from stubble to a short beard
    Guides on beard trimmers
  • Hair clipper

    A wider, stronger blade with numbered guards, made for cutting the hair on your head, from buzz cuts to fades.

    What it leaves
    #1 (1/8 in) to #8 (1 in) with standard guards
    Guides on hair clippers
  • Body groomer

    A shielded blade built for chest, back, armpit and groin hair, so it trims close without nicking sensitive skin.

    What it leaves
    A short trim, or a smooth finish with a foil head
    Guides on body groomers

How a guide gets made

Every guide goes through the same five stages. Tested methods are compared side by side and never given a score.

Read How We Test Grooming Tools
  1. Plan

    Start with a real question

    We start from what men search for and ask on forums, and plan one guide per question so guides never repeat each other.

  2. Research

    Read the sources in full

    Maker manuals, dermatology and medical pages. Every claim is tied to a linked source, and we say when advice comes from outside the US.

  3. Test

    Run it by the written protocol

    New shaver heads get a 21-day run-in first. Sessions are at least 48 hours apart, with checks at 10 minutes, 2 hours and the next morning.

  4. Review

    Check it before it goes live

    A second pass checks every quote against its source and every section against the plan before a guide is published.

  5. Update

    Date it and keep it current

    Guides show when they were written and updated. We review every guide at least once every 12 months, and check it within 14 business days when something changes.

What a test session measures

Same kit, same bathroom light, same time of morning.

Length
Median of 5 hairs, to the nearest mm
Redness
Photo at the same angle, 0, 1 and 24 hours
Sting
Rated 0 to 5, three times after a session
Itch
Rated 0 to 5 on days 1, 3 and 7
Regrowth
Photos on days 1, 3 and 7
Time and mess
Phone timer and a clean-up photo

Who pays for Grooming Nova

Readers do, indirectly, through affiliate commissions. What a guide recommends comes from its sources and tests alone.

How we make money

The business side

  1. You buy through a link in a guide
  2. The store, like Amazon, may pay us a commission

The editorial side

  1. A real question readers ask
  2. Sources and hands-on tests
  3. What the guide recommends

Money has no path to a recommendation. A commission can’t move a product up a list or soften a verdict, and brands can’t pay for a better place in a ranking. Sponsored content, when there is any, is always labeled. Sponsorship policy

Questions readers ask first

Something else? Ask Aman, or read who runs Grooming Nova.

How do you test grooming tools?

We buy every shaver, trimmer, clipper and body groomer we test with our own money and test it on Aman's own skin and hair, using one written protocol and the same fixed test kit. Each session goes into dated notes, photos and measurements, and methods are compared side by side, never scored. Every guide shows when it was last updated.

Is Grooming Nova independent, or paid for by grooming brands?

We're independent and reader-supported. When you buy through some links, we may earn a commission from Amazon, at no extra cost to you. As an Amazon Associate, Grooming Nova earns from qualifying purchases. We don't show display ads yet. When we start, they'll be served by Mediavine. We sell a Sponsored Post and a Sidebar Display Slot directly to brands. Both are always labeled, and our Sponsorship Policy explains the rules. None of this decides what we recommend.

What does Grooming Nova cover?

We cover electric shavers, trimmers, clippers and body groomers: how to choose and use them, beard and hair styles, parts and accessories, and fixes when something goes wrong. We add new topics based on reader questions.

How often are your guides updated?

We review every guide at least once every 12 months. If something changes in between, such as a product update, a recall, a price or policy change, or a reader report, we check the guide within 14 business days. Each guide shows its last-updated date.

Can I ask about a specific shaver, trimmer or clipper problem?

Yes. Use our contact page and choose "Suggest a guide or topic" or "Help with a grooming problem". Aman Singh, the founder, reads every message, and we reply within 48 hours.