BuzzCut Lab

#3 Guard Size — 10mm (3/8") Buzz Cut

Complete guide to #3 guard size: exact measurements, maintenance schedule, and styling tips. See how many millimeters is a #3 guard and whether it's right for your style.

#3 guard buzz cut - 10mm visual example
Guard Number
#3
Millimeters
10 mm
Inches
3/8"

#3 Guard Characteristics

Scalp Visibility:
Moderate scalp visibility
Maintenance:
Every 2-3 weeks
Best For:
Balanced style

Common Questions

A #3 guard is exactly 10 millimeters or 3/8" inches in length.

Compare with adjacent lengths

Not sure if #3 is right? Compare with nearby guard sizes: