Hat Sizes Converter
Practical tools for shopping, travel, and everyday life — sizes, weights, and airline limits worldwide.
🎩Hat Sizes
Unit
Enter your head circumference above to find your hat size in US, UK, EU, and India
💡Measure your head circumference with a flexible tape about 1 cm above your ears — where a hat would naturally sit. If between sizes, round up.
💡US and UK use the same fractional hat size system. EU sizes equal the head circumference in cm — the most intuitive system.
⚠️Indian hat sizes follow the UK/US fraction system. For traditional Indian headwear (topi, pagdi), sizes are usually given in cm directly.
⚠️Baseball caps and beanies often come in S/M/L rather than numeric sizes. M typically covers EU 57–58 (56–59 cm head circumference).