Clipper Guard Numbers Explained
(Chart + Guide)

What Length Is Each Clipper Guard Number?

Each clipper guard number adds about 1/8 inch (3 mm) of length: a #1 leaves 1/8 inch, a #2 leaves 1/4 inch (6 mm), a #4 leaves 1/2 inch (13 mm) and a #8 leaves 1 inch (25 mm). A higher number always means more hair is left behind.

Guard ranges differ between kits, so compare them in our best hair clippers guide before buying.

Standard clipper guards run in these lengths (they're near-universal across major brands):

Which Clipper Guard Number Should You Use for Each Cut?

• Induction cut (recruit buzz): no guard or a #0 all over; a #1 or #2 all over is a regular military buzz.
• Buzz cut with definition: #2–#3 on top, #1 on the sides.
• Crew cut: scissors or #4–#6 on top, tapering down the sides.
• Fade base: the fade blends between guards. A fade is a cut where the sides get gradually shorter toward the bottom. E.g. #1 up to #4, plus skin at the bottom for a skin fade.
• Sides of a longer style: #2–#3 keeps them neat without going too short.

How Do You Ask a Barber for a Clipper Guard Number?

Just state the number: "#2 on the sides, faded up to a #4, scissors on top." If you're unsure, ask the barber to start one guard longer than you think. You can always go shorter, never longer. Remember guards give the same length everywhere, so any real shape (fades, tapers) comes from blending between them, which is a barber skill, not a single guard.

Example of what to say

“A #2 on the sides and back, faded down to a #1 above the ears, and a #4 on top. If you are not sure, start with the #3 and we can go shorter.”

How Fast Does Hair Grow Past Each Guard Number?

Hair grows about half an inch a month, which is close to 1/8 inch a week. That works out to roughly one guard number per week, which is why a short cut looks grown-out after two weeks. Our hair growth statistics report collects the research on growth rates.

That pace is why short clipper cuts need a visit every 2 to 4 weeks, as our guide to how often to get a haircut explains, and why buzz cut regrowth takes months, not weeks.

Why Do the Same Clipper Guard Numbers Cut Differently?

The chart above covers the common standard sizes, but a few things can make the same number cut differently.

• Blade position: on clippers with a taper lever, cutting with the lever open leaves the hair slightly longer than cutting with it closed, even on the same guard.
• Half sizes: some sets include a #0.5 and #1.5, and some barbers use them to soften the jump between #1 and #2 in a fade.
• Brand differences: most follow the same numbering, but a few sets differ slightly, so if a new clipper seems off, compare lengths rather than trusting the number.
• Hair type: curly and coily hair looks shorter than the guard length because each strand curls back on itself, while straight hair stands up and looks fuller at the same number.

What Mistakes Do People Make With Clipper Guards?

• Clipping the guard on loosely. A guard that slips off mid-pass leaves a bald strip. Push it on firmly and check it before every section.
• Cutting against the grain without expecting it. Going against the growth direction cuts closer than the number suggests, especially at the crown and neckline.
• Starting too short. If unsure, start one size longer, look at the result dry, then go down. A #2 that should have been a #3 takes about a week to recover.
• Forgetting cowlicks. A swirl at the crown can stand up and look patchy at #1 or #2. A slightly longer guard over that spot usually looks more even.

How Do You Keep Clipper Guards Accurate?

Guards are simple plastic, but they still wear. Cracked or bent teeth can pull hair or cut unevenly, and a guard that no longer clicks firmly onto the blade is a safety risk as much as an accuracy one.

Brush hair out of the guards after each use and wash them in warm soapy water now and then, letting them dry fully before storing. Keep the full set together in order so you are not guessing between a #3 and #4 halfway through a haircut.

Should You Cut With Guards at Home or Go to a Barber?

A single-length buzz with one guard is easy at home, and our guide to buzzing your own hair walks through it. A fade that blends three or four guard numbers is harder, and that blend is what you pay a barber for. Most shops charge $25 to $45 for a standard cut; see our haircut cost guide.

• Write down the numbers your barber used, so you can repeat the cut or tidy it at home.
• Use our clipper guard sizes in mm chart if your clipper is labeled in millimeters.
• Compare the heights in fade types explained before you choose your bottom guard.
• Bring the numbers and a photo; how to talk to your barber covers the rest. The buzz cut styles gallery and our buzz cut statistics show which lengths men pick most.

Frequently Asked Questions