Number 1: One-eighth of an inch. Number 2: One-quarter of an inch. Number 3: Three-eighths of an inch. Number 4: Half an inch. Number 5: Five-eighths of an inch.

Number 3. This clipper size cuts to a length of ⅜ inches to about 7/16 inches if it's open. If you're opting for a fade, it might be best to ask your barber to start with a 3 so then they can move down to a 2 and lower as they fade it out. It also helps you keep more of your length.

How often should men's haircuts be perfected at the barber shop? It's a common question among men with a short answer: 2-3 weeks depending on how fast your hair grows and the haircut you desire. Yes, some men grow out their hair, but even longer manes need to be shaped and styled.

Basically, the larger the number, the longer your haircut will be. If you walk into a barbershop and ask for a number 6, you will receive a six guard and walk out with 3/4 of an inch of hair left. On the flipside, if you ask for a 1, you will receive a nearly-shaved head.