Number two haircut Although still very short, the popular number two clipper guard is also used for buzz cuts and fades. However, because the hair is a quarter of an inch long the scalp is not exposed in the way that it is with a zero or one cut. This makes it a good cut for guys who have thin hair or who are balding.

The number 4 haircut leaves hair half an inch long, making it a medium-short style that's versatile and popular. It allows for more styling options and is less severe than lower numbers. The number 4 haircut is great for those who want to keep their hair short but stylish.

The Number 3 length is 3/8 of an inch or 10mm. This is a great mid-length option that is stylish yet versatile. While it keeps your hair short and neat, it's not too closely cropped, giving you plenty of options for different hairstyles. Think of this haircut length as a perfect balance.

A 1 on the sides haircut is, as the name suggests, a hairstyle where the back and sides have been trimmed using the number 1 setting on a clipper. That means that the sides are trimmed to a length of ⅛ of an inch, or 3mm, whilst the top of the hair is left longer.