It is important to understand the hair lengths 1 2 3 4 and sizes of the hair clippers. Just in case you plan on going to a barber shop for a haircut. Since the clipper guards are related to different hair lengths, guys looking for the perfect haircut need to know about every number when asking for specific styles. Although it seems like there is a trivial difference between the 2 and 3 fade, you will be astonished to see the vast difference between the 1/8 inch looks.

We have piled up detailed descriptions along with images so that men can understand and visualize the clipper guard sizes and hair lengths 1 2 3 4. So in order to get your desired cut, make sure you go through this list.


Hair Clipper Sizes

As stated, the higher the number is, the longer the haircut will be. For instance,

Number 1

If you ask for a Number 1 haircut, a #1 guard will be attached for 1/8 inch of hair length.

Number 2

A Number 2 haircut corresponds to 1/4 inch length, which is still very short.

Number 3

A Number 3 haircut has 3/8 inch of hair left.

Number 4

A Number 4 haircut is longer leaving a medium length cut of around 1/2 inch.

Number 5

A number 5 haircut comprises of 5/8 inch of hair on the scalp.

A man can request for either of the hair lengths 1 2 3 4 depending on what he wants based on these readings.

Haircut Numbers

  •  One-eighth of an inch = #1
  •  One-quarter of an inch = #2
  • Three-eighths of an inch = #3
  • One-half of an inch = #4
  • Five-eighths of an inch = #5
  • Three-quarters of an inch = #6
  • Seven-eighths of an inch = #7
  • One inch = #8

Hair Lengths 1 2 3 4!

Number 1 Haircut

Leaving 1/8 inch of hair, a number 1 haircut is hardly any length. For fade sides and short buzz cuts, a #1 guard is used. Using a clipper size throughout would show your scalp so be aware.

Number 2 Haircut


This is one of the most popular clipper sizes, used regularly for buzz cuts and faded sides. The number 2 is also very short but slightly longer than the number 1, being 1/4 of an inch. But this does not expose the scalp, so it is a safe bet for those who are balding or have thin hair.

Number 3 Haircut

Being very popular among all the clipper sizes, number 3 has 3/8 inch of a length. A wide number of barbers use this to cut fades. Since this haircut is short and requires very low maintenance, many men ask for this haircut. It also works for both thick and thin hair.

Number 4 Haircut

Providing a reasonable length for most of the conservative hairstyles, a number 4 haircut gives you 1/2 inch of hair. These clippers do not produce a very short buzz, they start bordering on a crew cut or brush.

Number 5 Haircut


It is around 5/8 of an inch, leaving hair long enough to be brushed and styled. It works well if you do not want to create much contrast, and wish to taper off the sides. For a more classical cut use a #5 clipper and looks like a gentleman.

Number 6 Haircut

The number #6 works for styles that requires 3/4 inch of hair length, usually being used for tapered sides like the #5. This gets you something closer to a crew but not a buzz cut.

Number 7 Haircut

It is around 7/8 inch, used to give a crew cut using clippers. It is the best for buzzing the hair up top without scissors. Just use a smaller clipper to give a fade on the sides.

Number 8 Haircut

Source: Pinterest

Last but not the least, number 8 is the longest of all. It is ideal if you want to trim the longer hair on the top, fading the sides to shorter hair lengths 1 2 3 4. It will help in giving you a contrast haircut, balancing the #8.

Clipper Guard Sizes

Here is a quick review of the clipper guard sizes!

1 1 / 16 1.6
2 1 / 8 3.2
3 1 / 4 6.3
4 3 / 8 9.5
5 1 / 2 12.7
6 5 / 8 15,8
7 3 / 4 19.0
8 7 / 8 22.2
9 1 25.4
10 1 & 1/4 31.7