A number 3 haircut uses a #3 clipper guard, which leaves 3/8 inch (10 mm) of hair. Below you can see exactly how long that is, who it suits, the best combinations to ask your barber for, and how often to get it touched up.
| Number | Inches | mm | Scalp shows? | Best for |
|---|
Sizes follow the standard Wahl and Andis guard sets. Some brands differ slightly, so check your clipper’s manual.
What a Number 3 Haircut Looks Like
A #3 is a soft buzz cut. You can clearly see the hair and its color, and very little scalp shows. It looks short and clean but not severe, making it a popular choice for offices.
Who a #3 Haircut Suits
- People who want a buzz cut that still looks like hair
- Rounder faces, as it keeps some softness
- Medium to thick hair
- Crew cut tops and longer fade blends
Popular #3 Combinations
- All-over #3: a relaxed, easy buzz.
- Taper: #1 or #2 around the ears and neck, #3 on top.
- Crew cut: #3 on the sides with #5 or #6 on top.
How to Ask Your Barber
Say the guard number and where you want it, for example “#3 all over” or “#3 on the sides, longer on top”. If you want a smooth blend between two numbers, ask for a half size in between, such as a #2.5 between a #2 and #3.
How Often to Get It Cut
Every 2 to 4 weeks. A #3 grows to a #4 length in about a week. Plan your next appointment with our haircut frequency calculator, and see what it costs near you with our haircut cost calculator.
Frequently Asked Questions
How many mm is a number 3 haircut?
About 10 mm, or 3/8 inch.
Is a number 3 haircut short?
Yes, it is still a short buzz cut, but it is long enough that most of the scalp is covered.
Should I get a number 3 or number 4?
Choose a #3 for a cleaner look and a #4 if you want full coverage and a bit more softness.
Compare Other Haircut Numbers
Shorter: Number 2 haircut ยท Longer: Number 4 haircut. See every length side by side on our haircut numbers chart.