Not sure what a #2 or #4 actually means? Our haircut numbers chart shows every standard clipper guard size in inches and millimeters, what each length looks like, whether your scalp will show, and which guard to ask your barber for. Tap any number to see it, or type the length you want.

Haircut Numbers Explained

Haircut numbers refer to the plastic guard that clips onto the clippers. Each number leaves a set length of hair: the higher the number, the longer the hair. On most brands, each step up adds 1/8 inch (about 3 mm) up to a #8, which leaves a full inch. Barbers mix numbers to create fades, tapers and crew cuts.

• Number 1 haircut: 1/8 inch (3 mm), very short with visible scalp.
• Number 2 haircut: 1/4 inch (6 mm), the classic short buzz cut.
• Number 3 haircut: 3/8 inch (10 mm), a soft buzz with little scalp showing.
• Number 4 haircut: 1/2 inch (13 mm), a longer buzz with full coverage.
• Number 5 haircut: 5/8 inch (16 mm), short but full.
• Number 6 haircut: 3/4 inch (19 mm), neat with some movement.
• Number 8 haircut: 1 inch (25 mm), the longest guard in basic sets.
• 10 guard haircut: 1 1/4 inches (32 mm).
• 12 guard haircut: 1 1/2 inches (38 mm).
• 16 guard haircut: what people usually mean by a “16 guard”.

Popular Clipper Guard Combinations

• Classic buzz cut: #2 to #4 all over.
• Low fade: #0.5 or #1 at the bottom, blending up to a #2 or #3.
• Crew cut: #2 or #3 on the sides, #4 to #6 on top.
• Taper with length on top: #1 to #3 on the sides, scissors or a #10 to #12 on top.

See them in action in our buzz cuts for men, buzz cuts for women and fade haircut guides. Short cuts grow out fast, so use our haircut frequency calculator to plan your next trim, and try a matching beard with our beard filter.

Frequently Asked Questions

What is the shortest clipper guard?

The #0.5 (1/16 inch, 1.5 mm). With no guard at all, most clippers cut to about 1/32 to 1/16 inch.

What number is a normal buzz cut?

Most buzz cuts use a #2 (1/4 inch) to #4 (1/2 inch). A #2 shows a little scalp in bright light, while a #4 gives full coverage.

How many mm is a 3 guard?

A #3 guard leaves about 10 mm (3/8 inch) of hair.

Are clipper guard sizes the same for every brand?

Most major brands such as Wahl and Andis use the same standard up to a #8, but some brands label guards in millimeters or differ slightly, so check your clipper’s manual.

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