🎩 Hat Size Calculator

Enter your head circumference to instantly get your hat size across US, UK, EU and generic S/M/L/XL scales.

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1. Enter your measurement

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How to Measure Your Head

  1. Use a soft cloth measuring tape (or a string, then measure the string against a ruler).
  2. Wrap the tape around your head about 1cm / 0.4in above your eyebrows and ears — the widest part of your head.
  3. Keep the tape snug but not tight, and level all the way around.
  4. Note the measurement in inches or centimeters and enter it above.
  5. For the best fit, measure 2-3 times and use the average.

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Hat Size Chart

InchesCentimetersUSUKLetter

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