
The numbers on electric razors refer to the clipper guard sizes. They are used to help measure the length of hair left after cutting. The numbers represent a specific length, with each number corresponding to one-eighth of an inch. For example, a #1 cut will leave hair at an eighth of an inch, while a #8 cut will leave a full inch. These numbers are also used as a quality control measure by manufacturers, to identify which set of grinding or honing wheels/spindles may need maintenance if a bad batch of blades is found.
| Characteristics | Values |
|---|---|
| Number of guards | 8 (sometimes up to 10, depending on the brand) |
| No guard attached | 0 |
| Length of hair after using guard 0 | Shortest haircut possible |
| Length of hair after using guard 1 | ⅛ of an inch |
| Length of hair after using guard 2 | ¼ of an inch |
| Length of hair after using guard 3 | ⅜ of an inch |
| Length of hair after using guard 4 | ½ of an inch |
| Length of hair after using guard 5 | ⅝ of an inch |
| Length of hair after using guard 6 | ¾ of an inch |
| Length of hair after using guard 7 | ⅞ of an inch |
| Length of hair after using guard 8 | 1 inch |
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What You'll Learn

The number indicates the length of the haircut in inches
The number system for electric razors is designed to help you achieve your desired haircut length. The number indicates the length of the haircut in inches, with each number representing one-eighth of an inch of hair left. This means that the higher the number, the longer your hair will be post-cut. For instance, a number one cut will leave you with an eighth of an inch of hair, whereas a number eight will leave you with a full inch.
The number system is also useful for communicating specific haircut styles. For example, a zero cut is achieved without a clipper guard and results in a shaved head or skin fade. A number one cut is a very short buzz cut, and a number two is also a buzz cut but with a quarter of an inch of hair left, making it a good option for those with thinning hair. Numbers three and four are the highest numbers used in fades, with four being closer to a crew or brush cut.
If you're looking for a classic cut, a number five will give you a tapered look without the extreme contrast of a skin fade. Numbers six and seven are also used to create tapered sides, with the latter leaving you with an extra one-eighth of an inch of hair, making it ideal for those who want a crew cut with styling versatility.
It's worth noting that while the number system is consistent across brands, there may be slight variations in length from brand to brand.
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The higher the number, the longer the hair will be
The number system on electric razors is designed to help you achieve your desired haircut. The higher the number, the longer your hair will be after cutting. This is because the number refers to the size of the guard attached to the electric razor, which determines how close the razor can get to your scalp.
The numbers usually range from 0 to 8, with some brands offering up to 10 different sizes. A size 0 guard will give you the shortest haircut possible, as it involves no guard at all, resulting in a shaved head or skin fade. The higher the number, the longer your hair will be, as each number represents an additional one-eighth of an inch of hair left on your head. For example, a number 1 cut will leave your hair at one-eighth of an inch, while a number 8 cut will leave you with a full inch of hair.
The lower numbers are often used for buzz cuts and fades, with a number 1 or 2 cut creating a very short buzz cut look. A number 3 cut is the highest number typically used for fades and is also a popular choice for those who want to keep their hair short and neat. Moving into the mid-range numbers, a size 4 guard will give you a slightly longer and more conventional cut, often considered a crew cut.
If you're looking for a longer cut that can be styled, you can opt for a number 5 or higher. A number 5 will give you a groomed and classic look, allowing for tapered sides without the extreme contrast of a skin fade. The number 6 and 7 guards are often used to create more subtle tapered sides, with the added length of an extra one-eighth of an inch for the number 7.
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Number 0 means no guard attached
When it comes to electric razors and hair clippers, the number 0 means there is no guard attached. This results in the shortest haircut possible, a traditional "buzz cut", or "chrome dome". It is also known as a skin fade or a shaved head. With no guard in place, the blade is as close to the head as possible, and the scalp will be exposed.
A number 0 haircut is ideal for those who want a very short, low-maintenance style. It is worth noting that, without a guard, the scalp will be visible through the hair. This means that those with thinning hair or bald spots may wish to opt for a slightly longer cut, such as a number 1 or 2, to avoid drawing attention to these areas.
The number 0 cut is the shortest option available and is a good choice for those who want a simple, quick style. It is also a popular choice for those who want a very short, uniform length all over, without any fading or tapering. This cut is often favoured by those in the military, as well as those who want a no-fuss, easy-to-manage hairstyle.
While a number 0 cut is a bold and striking choice, it is important to consider the shape of your head and face when opting for such a short style. The number 0 cut will accentuate the shape of the head, so it is worth bearing this in mind before committing to such a close shave.
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Number 1 is a very short buzz cut
The number 1 buzz cut is a bold and confident look. It is a popular choice for those who want a no-fuss, masculine style. This cut is also a great base for those who want to experiment with different styles as it is easy to change and modify. The number 1 is a versatile cut that can be worn in a variety of ways, making it a popular choice for those who want a simple yet adaptable style.
To achieve this look, simply use your clippers with a number 1 guard all over your head. Ensure your hair is completely dry before you start, and begin cutting at the sides, moving up towards the top of your head. Go slowly and with the grain of your hair to ensure an even cut. You may need to go over some areas a few times to ensure all the hair is the same length.
The number 1 buzz cut is a great option for those who want a simple, low-maintenance style. It is a quick and easy cut that can be achieved at home with a set of clippers. This style is also a popular choice for those who want a fresh start or a new look as it is a dramatic change from longer styles. The number 1 buzz cut is a classic, masculine style that is easy to achieve and even easier to maintain.
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Number 8 is a light trim
The number system on electric razors is designed to help you achieve your desired haircut. The numbers, typically ranging from 0 to 8, correspond to the length of the plastic guard attachments on the razor. These guards determine how much hair will remain on your head after the cut.
Now, when it comes to "Number 8," this setting indicates a light trim. Asking your barber for an "8" means you want to retain a full inch of hair on your head. This length provides a nice balance between short and stylish, giving you the freedom to create different looks such as a side parting or a slicked-back style.
Compared to the lower numbers, which result in shorter haircuts like buzz cuts or fades, an "8" is relatively long. With an "8," you're stepping into a realm where your hair can be brushed and styled more conventionally.
It's worth noting that while the numbers generally correspond to one-eighth of an inch, there might be slight variations among brands. However, the principle remains consistent: the higher the number, the longer your hair will be after the cut.
So, if you're looking for a light trim that leaves room for styling and doesn't expose your scalp, the number 8 setting on your electric razor is a great choice.
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Frequently asked questions
The numbers on electric razors refer to the clipper guard sizes. These sizes indicate the length of the hair that is left after the clipper has been used.
The majority of hair trimmers come with eight different guard sizes, ranging from 0 to 8. However, some brands may offer up to 10 sizes.
The lower the number, the shorter the hair will be. If you want a very short haircut, you can ask for a number 1 or 2, which will leave your hair at an eighth or a quarter of an inch, respectively. For slightly longer hair, a number 3 or 4 will give you a fade or a crew cut. Numbers 5, 6, and 7 will give you a longer, more classic cut that can be styled. Finally, a number 8 will leave you with a full inch of hair, allowing for more freedom to style.











































