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Hat Size Converter
Convert hat sizes between international alpha labels, US fitted sizes, EU numbers, and head circumference measurements.
How to use this tool
- Pick the sizing system you know: alpha, fitted, numeric, or circumference.
- Select your size to reveal matching values across every standard.
- Copy or download the equivalents for quick reference while shopping.
Useful when
- Buying hats from international brands that publish only one size scale.
- Outfitting teams or events where everyone needs consistent headwear.
- Comparing fitted cap sizes to metric measurements before custom embroidery.
Measuring tips
- Measure around the widest part of your head just above the ears.
- Keep the tape snug but not tight to mimic actual fit.
- If you are between sizes, choose the larger option and adjust with padding if needed.
FAQ
- Do sizes differ between manufacturers?
- Slight variations are common. Use this chart as a baseline and confirm with the brand-specific guide.
- Can I convert kids' sizes?
- This table focuses on adult ranges. For children, measure circumference and compare with centimeter values.
- How accurate are the inch fractions?
- Fractions are rounded to the nearest eighth of an inch, matching common fitted-cap increments.
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