GUIDE · CLIPPER GUARDS
Clipper guard numbers: how long is each guard, really?
A guard number is not a style. It is the length of hair left behind, and it shifts slightly with the clipper brand and the lever position. Here is the chart and how to use it without surprises.
SHORT ANSWER
On most clippers (Wahl, Andis, BaByliss), a #1 guard leaves about 3 mm (1/8 in), a #2 about 6 mm (1/4 in), a #3 about 10 mm (3/8 in), a #4 about 13 mm (1/2 in) and a #8 about 25 mm (1 in). With no guard (“0”), 0.4 to 1 mm remains depending on the blade lever. So “a 2 on the sides” means roughly 6 mm all over the sides, not a fade.
CHOOSE
Guard chart (approximate hair length left)
No guard / 0
0.4–1 mm depending on the lever; “skin” or foil shaver is shorter still.
#0.5
1.5 mm (1/16 in) — very short, strong contrast with the top.
#1
3 mm (1/8 in) — very short sides, scalp slightly visible.
#1.5
4.5 mm (3/16 in) — the most requested in-between for a tight side.
#2
6 mm (1/4 in) — classic short side, scalp barely visible.
#3
10 mm (3/8 in) — short but covering; good for fine hair.
#4
13 mm (1/2 in) — moderate all-over buzz cut length.
#5–#6
16–19 mm (5/8–3/4 in) — the start of styleable length on top.
#7–#8
22–25 mm (7/8–1 in) — short top length, refined with scissors afterwards.
Why the same number does not always give the same length
The lengths above are for the most common Wahl and Andis guards; other brands differ by a millimetre or two. The clipper lever adds up to another millimetre when open. And curly or thick hair looks shorter after cutting than straight hair of the same length.
That is why a good barber confirms the number by showing you the guard, then checks a small area before cutting everything. If you switch barbers, bring a photo of your sides on day 3 instead of repeating a number.
“A 2 on the sides”: what are you actually asking for?
A single number describes one uniform length, like a buzz cut on the sides. A fade uses several lengths blended into each other: for example 0 at the neck, then 1, then 2 going up, then scissors into the top. Asking for “a 2” says nothing about the height or contrast of the blend.
State three things instead: the shortest length (down to skin or not), the height where the transition starts (low, mid, high) and the length on top. The fade vs taper guide explains how to pick the height for your face and grow-out.
- Uniform buzz cut
- One number everywhere, usually 2 to 4: simple, but shows the head shape as it is.
- Short sides + longer top
- One number for the sides (1.5 to 3) and a length in centimetres or inches for the top.
- Fade
- A starting length (0, 0.5 or 1), a height and a top length; the number alone is not enough.
Which number suits which hair type?
Fine or thinning hair: a 2 or 3 on the sides keeps some shadow and reduces contrast with a less dense top. Very thick, straight hair: a 1 or 1.5 stops the sides puffing out in week two. Afro or curly hair: the true length is longer than it looks; a 1 or 1.5 reads shorter than it is.
On top, guards stop at about 25 mm. Beyond that the cut is done with scissors, which lets the barber keep weight where it helps the shape.
How long does a guard length stay sharp?
Hair grows about 1 to 1.5 cm a month, roughly 3 mm a week. Sides cut with a #1 therefore double in length within a week and lose their crispness around week two or three. Sides at a #3 stay presentable longer because the relative change is smaller.
If you want to stretch appointments to four or five weeks, pick a slightly longer number on the sides and a taper rather than a skin fade. The haircut-frequency guide covers realistic intervals.
How to ask Youssef
Say the shortest length you are comfortable with, show a side photo and say whether you want the cut to last three or five weeks. Youssef confirms the guard by showing it, cuts a test patch and adjusts before continuing. If you do not know any numbers, “I want to see a little skin” or “I don’t want to see skin” is enough.
YOUSSEF’S METHOD
Youssef’s method
- 01
Confirm
Show the guard and lever position before the first pass.
- 02
Test
Cut a small patch behind the ear to validate the length.
- 03
Build
Go up one number at a time for a line-free transition.
- 04
Record
Tell you the numbers used so the cut is repeatable.
FAQ
The questions left.
How long does a #2 guard leave?
About 6 mm, or 1/4 inch, on common Wahl and Andis clippers. An open lever can add up to 1 mm.
Does a “0” mean shaved to the skin?
No. With no guard the blade leaves 0.4 to 1 mm. Down-to-skin is done with a foil shaver or razor, and is booked as Skin Fade with Youssef.
What number is a buzz cut?
Most often 2 to 4 (6 to 13 mm). Start longer: you can always go shorter, not the other way.
What number for fine hair?
A 2 or 3 on the sides keeps shadow and avoids a harsh contrast with the top.
Are guard numbers the same at every barbershop?
Within a millimetre or two, yes, for Wahl and Andis. A day-3 photo is still more reliable than a number for reproducing a cut elsewhere.
Which service should I book?
Standard Haircut for clipper sides with no visible skin, Skin Fade when the transition goes down to skin. Prices are posted on the services page.
PUT IT INTO PRACTICE
Fade Haircut & Skin Fade Montreal
Low fade, mid fade, high fade or skin fade in Montreal, built by Youssef around face shape, density and growth direction in NDG.
YOUR NEXT APPOINTMENT
Precise advice. Then a precise cut.
Choose the matching service, then open Youssef’s direct schedule.