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Convert between US, UK, and EU hat sizes
| US/UK | EU | cm | Inches | Size |
|---|---|---|---|---|
| 6 3/4 | 54 | 54 | 21.25 | S |
| 6 7/8 | 55 | 55 | 21.625 | S |
| 7 | 56 | 56 | 22 | M |
| 7 1/8 | 57 | 57 | 22.375 | M |
| 7 1/4 | 58 | 58 | 22.75 | L |
| 7 3/8 | 59 | 59 | 23.125 | L |
| 7 1/2 | 60 | 60 | 23.5 | XL |
| 7 5/8 | 61 | 61 | 23.875 | XL |
| 7 3/4 | 62 | 62 | 24.25 | XXL |
| 7 7/8 | 63 | 63 | 24.625 | XXL |
| 8 | 64 | 64 | 25 | XXXL |
Use a flexible measuring tape and wrap it around your head about 1 inch (2.5 cm) above your eyebrows and ears, where your hat would normally sit. Keep the tape level and snug but not tight. Record the measurement and use the chart above to find your size.
The average adult hat size is 7 1/8 to 7 1/4 (57-58 cm), which corresponds to Medium/Large. Men typically range from 7 to 7 5/8, while women average 6 7/8 to 7 1/4.
Yes. Fitted hats use numerical sizes (7 1/4, 7 3/8, etc.), while adjustable hats typically use S/M/L/XL or One Size Fits Most (usually fits 7 to 7 5/8).
Wrap a flexible measuring tape around your head about 1 inch above your eyebrows and ears, where your hat would normally sit. Keep it level and snug but not tight. If between sizes, size up for comfort.
Yes, sizing can vary slightly between manufacturers. Premium hat makers follow stricter standards, but mass-market hats may fit differently. Always check the brand's specific sizing chart when available.
For fitted hats, size up for comfort. Hats slightly too large can use sizing tape or foam inserts, but hats too small will be uncomfortable. For adjustable hats, choose based on your measurement range.
Yes. Children's hats typically use age ranges (6-12 months, 2-4 years) or S/M/L. Infant sizes start around 16-17 inches (41-43 cm) circumference, increasing with age.