Hat Size Converter
Convert head circumference to hat size in inches, cm, and fitted sizing (S–XL).
| Head (in) | Head (cm) | Size | Fitted |
|---|---|---|---|
| 20.5" | 52 | XS | 6⅝ |
| 21" | 53 | S | 6¾ |
| 21.5" | 55 | S/M | 6⅞ |
| 22" | 56 | M | 7 |
| 22.5" | 57 | M/L | 7⅛ |
| 23" | 58 | L | 7¼ |
| 23.5" | 60 | L/XL | 7½ |
| 24" | 61 | XL | 7⅝ |
| 24.5" | 62 | XL/XXL | 7¾ |
| 25" | 63 | XXL | 7⅞ |
Sizes are guidelines. Check brand-specific charts for best fit.
Quick Facts
- •Average men's head: 22-23" / 56-58 cm
- •Average women's head: 21.5-22.5" / 55-57 cm
- •Fitted sizes use ⅛" increments
- •Measure above ears around widest point
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Frequently Asked Questions
Where can I find a hat size chart?
Use the table above to match your head circumference in cm or inches to a hat size (S–XL) and fitted size.
How do I measure my head for a hat?
Wrap a tape measure around your head about 1 inch above ears, across the forehead. Note cm or inches.
What is a size 7 hat?
Fitted size 7 ≈ 22" / 56 cm head circumference, typically a Medium.
What is the most common hat size?
Medium to Large (7 to 7¼) — about 56-58 cm or 22-23".
Are men's and women's hat sizes different?
The measurement is the same, but women's heads average slightly smaller.
What if I'm between sizes?
Go up to the larger size for comfort. Hats often have adjustment mechanisms.