Hat Sizing Guide
How to Measure Your Head
For the best fit, measure your head before purchasing any vintage hat. Hat sizing was not standardized across decades or makers, so your head circumference is the most reliable measurement to use.
Head Circumference
Wrap a soft measuring tape around your head approximately 1 inch above your eyebrows and ears, at the widest part. Keep the tape level all the way around. This is your primary hat size measurement.
Head Length (Front to Back)
Measure from your forehead (1 inch above your brows) straight back to the most prominent point at the back of your head.
Head Width (Side to Side)
Measure across your head from just above one ear to just above the other ear.
Women's Vintage Hat Size Conversion
| Head Circumference | US Hat Size | UK Hat Size | Vintage Label |
|---|---|---|---|
| 20.5" / 52cm | 6⅜ | 6⅜ | XS |
| 21" / 53cm | 6½ | 6½ | XS–S |
| 21.5" / 54.5cm | 6⅝ | 6⅝ | S |
| 22" / 56cm | 6¾ | 6¾ | S–M |
| 22.5" / 57cm | 6⅞ | 6⅞ | M |
| 23" / 58.5cm | 7 | 7 | M–L |
| 23.5" / 59.5cm | 7⅛ | 7⅛ | L |
| 24" / 61cm | 7¼ | 7¼ | L–XL |
Men's Vintage Hat Size Conversion
| Head Circumference | US Hat Size | UK Hat Size | Vintage Label |
|---|---|---|---|
| 21.5" / 54.5cm | 6⅝ | 6⅝ | S |
| 22" / 56cm | 6¾ | 6¾ | S–M |
| 22.5" / 57cm | 6⅞ | 6⅞ | M |
| 23" / 58.5cm | 7 | 7 | M |
| 23.5" / 59.5cm | 7⅛ | 7⅛ | M–L |
| 24" / 61cm | 7¼ | 7¼ | L |
| 24.5" / 62cm | 7⅜ | 7⅜ | L–XL |
| 25" / 63.5cm | 7½ | 7½ | XL |
A Note on Vintage Hat Sizing
Vintage hats — particularly from the 1940s–1960s — were often sized by number (e.g., 22, 23) referring directly to the head circumference in inches. Some are labeled S/M/L only. Always check the interior measurement of the hat band if listed, as hat sizing was not standardized across makers or decades.
Tip: Most vintage hats have very little stretch. If you are between sizes, size up. If you have questions about a specific hat's fit, feel free to contact us before purchasing.