Clipper guard sizes explained
The number is how much hair is left standing, not how much comes off. Here is the full mapping, and why the number is not a standard.
By Sawyer V. · Published
We have not tested any of this. Everything below is compiled from published manufacturer specifications, and the arithmetic is printed so you can check it. This page carries affiliate links: if you buy through one we earn a commission at no extra cost to you, and it does not change the order of the picks. Full disclosure.
The short version
The number is what is left standing, not what comes off. The scale runs in eighths of an inch, so #1 is about 3 mm, #2 about 6 mm, #4 about 12.5 mm and #8 about 25 mm. Lower number, shorter cut. The numbers are a widely followed convention rather than a standard, so check the millimeter figure on your own guards - and always start two numbers longer than you want.
| # | Pick | Lasts | Score | Price |
|---|---|---|---|---|
| 1 | Wahl 5 Star Magic Clip (8148) Fading and blending at home | 1,300 shaves* | 5.9/10 | Check price on Amazon |
| 2 | Wahl Elite Pro (79602) The widest published guard range | 1,300 shaves* | 5.6/10 | Check price on Amazon |
| 3 | Wahl Color Pro (79300) A first home haircut | 1,300 shaves* | 5.3/10 | Check price on Amazon |
No live price is currently verified, so every button here reads Check price instead of a number we cannot stand behind. Why we do it that way.
What the number means
The length of hair the guard leaves standing, measured from the skin. Not how much the clipper removes. So a #1 leaves less than a #4, and going down a number cuts shorter.
That sounds obvious written down and it is the thing people reliably reverse under pressure with a running clipper against their own head. It is worth saying out loud once before you start.
The full mapping
| Guard | Length left | Reads as |
|---|---|---|
| No guard | 0.5 to 1.5 mm depending on blade | Skin visible; a bare blade or an adjustable set close |
| #0 | 1.5 mm (1/16 in) | Very short; scalp clearly visible |
| #1 | 3 mm (1/8 in) | Short buzz, scalp faintly visible |
| #2 | 6 mm (1/4 in) | The standard short buzz |
| #3 | 9.5 mm (3/8 in) | Short but clearly hair rather than shadow |
| #4 | 12.5 mm (1/2 in) | Medium; the forgiving all-over length |
| #5 | 16 mm (5/8 in) | Medium to long |
| #6 | 19 mm (3/4 in) | Long enough to comb |
| #7 | 22 mm (7/8 in) | Long |
| #8 | 25 mm (1 in) | The longest most guard sets reach |
Why the numbers are not a standard
Because nobody ever agreed one. The eighth-of-an-inch convention is widely followed and entirely voluntary, and manufacturers increasingly publish millimeter figures instead of relying on it.
- Wahl Elite Pro: twelve guards published as a range from 1/16 inch to 1 inch - the convention, stated in inches.
- Wahl Color Pro: color-coded, with the code printed on the clipper body. The color is the primary identifier and the number is secondary.
- Wahl Magic Clip: eight attachment combs, published as a count rather than a range.
- Beard trimmers have largely abandoned numbers entirely in favor of dials calibrated in millimeters - covered separately here, because the conventions genuinely differ between the two categories.
The practical consequence: write down the millimeter figure, not the number. A millimeter figure transfers when you replace the clipper. A guard number does not.
Using a guard properly
Flat against the skull. Tilting the guard away from the head leaves hair longer than the number says. This is the mechanism behind one side ending up longer than the other: your wrist angle differs between hands and you cannot feel the difference.
Against the grain, overlapping by half. Moving with the growth lays hair down ahead of the blade so it does not get cut. Overlapping each pass by half the guard width prevents the thin uncut stripes that only appear in daylight.
Push the guard on until it clicks. A guard that pops off mid-stroke turns a #4 into a bare blade instantly. This is why the Elite Pro's published stainless Secure-Fit clips are a real feature rather than packaging copy.
Guards do not fade
A guard cuts one length. Moving from a #1 to a #2 produces a step, and a fade is defined by having no step. What removes it is the taper lever, which moves the blade continuously within a single guard setting.
So if your plan involves blending, the guard numbers set the lengths you blend between and the lever does the actual blending. The fading roundup covers which clippers make that easy, and the self-cut guide covers where blending fits in the order of operations.
Every pick, with the working
Each entry shows the published specifications, the axis scores they produce and what you give up. The order is the computed order, not a commercial one, and the arithmetic is open underneath every score.
Our pickFading and blending at home
Wahl 5 Star Magic Clip (8148)
Cord or cordless with a published 90-minute lithium runtime and zero-overlap 2161 blades, plus a taper lever you can work with your thumb mid-stroke. The taper lever is the whole reason this is the fade pick: it changes cutting length continuously rather than in guard-sized jumps, which is what a blend actually needs.
- Material
- Not published
- Runtime
- 90 min
- Charge time
- Not published
- Length settings
- 8
- Waterproof
- Not published
- Made in
- Not published
- Refill
- Proprietary to the maker
- Warranty
- Not published
- Assumed service life
- 1,300 uses
The arithmetic: 260 uses a year x 5 years of assumed service life = 1300 uses.
What it gets right
- Published 90-minute lithium runtime, and it runs corded when flat
- Zero-overlap 2161 blades with a thumb-operated taper lever for continuous length change
- Eight attachment combs, oil and cleaning brush in the box
- Cord-or-cordless, so a dead battery never ends a haircut halfway
Flaws
- A taper lever rewards practice; on a first attempt it is one more thing to get wrong
- Wahl does not publish a motor rating for it, so it cannot be compared numerically to the corded Andis
- No published charge time
The working behind the 5.9
- How long it lasts: not scored
- Not scored. This is a durable item, not a consumable, so how long it lasts is an assumption about service life rather than something the pack size tells us.
- Ease of switching: 8.0
- Cord-or-cordless removes the flat-battery failure entirely (++), 90 minutes published (+), eight combs is a sane number (+), but a taper lever is a skill and a first-time home barber has enough of those already (-).
- Refill economics: 4.0
- Only this maker's refill fits, so the ongoing price is set by the maker rather than by a market. This is where the real cost of ownership hides.
- What the maker publishes: 4.0
- 2 of 5 specifications a buyer would expect are published: runtimeMin, settings. Not published: chargeMin, material, warrantyLabel. 2 / 5 x 10 = 4.0.
Axes with no published input are dropped and the remaining weights re-normalized, so a product is not punished for a category where an axis does not apply. Specifications compiled 3 September 2026 from Wahl 5 Star Magic Clip 8148 published specifications.
2The widest published guard range
Wahl Elite Pro (79602)
Corded, with self-sharpening precision blades Wahl publishes as cutting 40 per cent faster, twelve color-coded guards spanning 1/16 inch to 1 inch, an adjustable taper lever and an eight-foot braided cord. The guard range is the reason to pick it: 1/16 to 1 inch covers a skin-close neckline and a long top from one box.
- Material
- Not published
- Runtime
- Not published
- Charge time
- Not published
- Length settings
- 12
- Waterproof
- Not published
- Made in
- Not published
- Refill
- Proprietary to the maker
- Warranty
- Not published
- Assumed service life
- 1,300 uses
The arithmetic: 260 uses a year x 5 years of assumed service life = 1300 uses.
What it gets right
- Twelve published guards from 1/16 in to 1 in - the widest range in this ledger
- Self-sharpening precision blades with a published cutting-speed claim
- Secure-Fit guides with stainless steel clips, so a guard does not pop mid-stroke
- Eight-foot braided cord, which is the difference between reaching your own neckline and not
Flaws
- Corded only
- Twelve guards is a lot of plastic to store and keep in order
- No published motor rating or warranty
The working behind the 5.6
- How long it lasts: not scored
- Not scored. This is a durable item, not a consumable, so how long it lasts is an assumption about service life rather than something the pack size tells us.
- Ease of switching: 8.5
- Twelve published guards from 1/16 in to 1 in cover every length a head needs from one box (++), secure-fit clips (+), corded with no runtime to manage (+), but no published motor or warranty figure (-).
- Refill economics: 4.0
- Only this maker's refill fits, so the ongoing price is set by the maker rather than by a market. This is where the real cost of ownership hides.
- What the maker publishes: 2.0
- 1 of 5 specifications a buyer would expect are published: settings. Not published: runtimeMin, chargeMin, material, warrantyLabel. 1 / 5 x 10 = 2.0.
Axes with no published input are dropped and the remaining weights re-normalized, so a product is not punished for a category where an axis does not apply. Specifications compiled 3 September 2026 from Wahl Elite Pro 79602 published specifications.
3A first home haircut
Wahl Color Pro (79300)
Corded, self-sharpening precision blades, an adjustable taper lever, and guards that are color-coded to their length with a matching guide printed on the clipper body. That last detail is the entire pitch and it is a better one than it sounds: the most common home-haircut disaster is reaching for the wrong guard.
- Material
- Not published
- Runtime
- Not published
- Charge time
- Not published
- Length settings
- Not published
- Waterproof
- Not published
- Made in
- Not published
- Refill
- Proprietary to the maker
- Warranty
- Not published
- Assumed service life
- 1,300 uses
The arithmetic: 260 uses a year x 5 years of assumed service life = 1300 uses.
What it gets right
- Color-coded guards with the code printed on the clipper - the cheapest possible defense against grabbing the wrong one
- Self-sharpening precision blades, published by Wahl
- Corded, so there is no battery to manage or degrade
- Adjustable taper lever included even at this level
Flaws
- Corded only - you are working around a cable behind your own head
- Wahl does not publish a motor rating, runtime or warranty for it
- Kit contents vary between the 79300 variants, so check the listing rather than the model number
The working behind the 5.3
- How long it lasts: not scored
- Not scored. This is a durable item, not a consumable, so how long it lasts is an assumption about service life rather than something the pack size tells us.
- Ease of switching: 9.0
- Color-coded guards remove the single most common home-haircut error (++), corded so the battery is never the problem (+), but Wahl publishes almost nothing about it - no motor, no runtime, no warranty (--).
- Refill economics: 4.0
- Only this maker's refill fits, so the ongoing price is set by the maker rather than by a market. This is where the real cost of ownership hides.
- What the maker publishes: 0.0
- 0 of 5 specifications a buyer would expect are published: . Not published: runtimeMin, chargeMin, settings, material, warrantyLabel. 0 / 5 x 10 = 0.0.
Axes with no published input are dropped and the remaining weights re-normalized, so a product is not punished for a category where an axis does not apply. Specifications compiled 3 September 2026 from Wahl Color Pro 79300 published specifications.
No live price is currently verified, so every button here reads Check price instead of a number we cannot stand behind. Why we do it that way.
Questions people actually ask
What length is a number 2 clipper guard?
About 6 mm, or a quarter of an inch, on the traditional eighth-of-an-inch scale. It reads as a short buzz with the scalp faintly visible on most hair. But the scale is a convention rather than a standard, so confirm against your own guard set.
Is a lower number shorter or longer?
Shorter. The number is the length left standing, so going down a number cuts closer. This is reliably the first thing people get backwards with a clipper in their hand.
What is a number 0 or a zero guard?
Roughly 1.5 mm, half a #1. Below that you are into no-guard territory, where the blade itself sets the length - which on an adjustable clipper like the Andis Master runs down to 000, close enough to see scalp clearly.
Do clipper guards fit between brands?
Often not. Attachment geometry differs between makers and even between lines from the same maker, so a Wahl guard is not guaranteed to clip onto an Andis. Buy replacement guards for your specific clipper rather than by number.
What guard is a buzz cut?
Most buzz cuts land between #1 and #4 - roughly 3 mm to 12.5 mm. A #3 or #4 all over is the forgiving version; a #1 shows scalp and shows every unevenness with it.