Hat Size Converter
Convert hat sizes between US, UK, EU, and head circumference measurements
Size Converter
Select your current size and system
Enter your hat size or head circumference
Converted Sizes
US
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UK
-
EU
-
Inches
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CM
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AU
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JP
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Reference Table
Complete size conversion chart
| US | UK | EU | Inches | CM | AU | JP |
|---|---|---|---|---|---|---|
| 6 1/4 | 6 1/8 | 50 | 19.625 | 50 | 50 | XS |
| 6 3/8 | 6 1/4 | 51 | 20 | 51 | 51 | XS |
| 6 1/2 | 6 3/8 | 52 | 20.375 | 52 | 52 | XS |
| 6 5/8 | 6 1/2 | 53 | 20.75 | 53 | 53 | S |
| 6 3/4 | 6 5/8 | 54 | 21.25 | 54 | 54 | S |
| 6 7/8 | 6 3/4 | 55 | 21.625 | 55 | 55 | S |
| 7 | 6 7/8 | 56 | 22 | 56 | 56 | M |
| 7 1/8 | 7 | 57 | 22.375 | 57 | 57 | M |
| 7 1/4 | 7 1/8 | 58 | 22.75 | 58 | 58 | L |
| 7 3/8 | 7 1/4 | 59 | 23.125 | 59 | 59 | L |
| 7 1/2 | 7 3/8 | 60 | 23.5 | 60 | 60 | LL |
| 7 5/8 | 7 1/2 | 61 | 23.875 | 61 | 61 | LL |
| 7 3/4 | 7 5/8 | 62 | 24.25 | 62 | 62 | 3L |
| 7 7/8 | 7 3/4 | 63 | 24.625 | 63 | 63 | 3L |
| 8 | 7 7/8 | 64 | 25 | 64 | 64 | 4L |