How to Measure Your Hat Size

So, you’re on the hunt for a new hat and wondering: how do I measure my hat size? And what do those numbers on the label actually mean? Don’t worry — it’s easier than you think.

Follow these simple steps to find your perfect fit:


Step 1: Measure Your Head

You’ll need a flexible measuring tape (or a piece of string and a ruler). Having a friend help makes it easier, but you can do it yourself too.

  1. Wrap the tape or string around your head where the hat will sit — about 1/8 inch above your ears and across the middle of your forehead, roughly half an inch above your eyebrows.
  2. Hold the tape snug but not tight — it should feel comfortable, not restrictive.
  3. Mark the point where the tape meets and note the measurement in centimeters for best accuracy. (Centimeters allow for a more precise and consistent fit than inches.)
  4. If using string, hold your spot with your finger, then lay it flat next to a ruler to measure.
  5. If your measurement falls between sizes, always size up. You can add a bit of padding inside the sweatband for a more custom fit.


Step 2: Find Your Hat Size

Most hats use numeric sizing rather than small, medium, or large. This gives you a more accurate and tailored fit. Use the chart below to find your size using both inches and centimeters (metric).

Size Label Hat Size Inches Centimeters (cm)
X-SMALL 6 3/8 – 6 5/8 20 1/4 – 21 51 – 53
SMALL 6 3/4 – 6 7/8 21 1/2 – 21 7/8 54 – 55
MEDIUM 7 – 7 1/8 22 1/4 – 22 5/8 56 – 57
LARGE 7 1/4 – 7 3/8 23 – 23 3/8 58 – 59
X-LARGE 7 1/2 – 7 5/8 23 3/4 – 24 60 – 61
2XL 7 3/4 – 7 7/8 24 1/2 – 25 62 – 63
3XL 8 25 1/2 64

Helpful Fitting Tips

  • Your hat should rest comfortably in the center of your forehead, just above your eyebrows.
  • It shouldn’t sit too low or cover your eyes.
  • A sweatband should feel secure but not tight. A light mark on your forehead is normal — discomfort is not.

Measuring your hat size may seem tricky at first, but once you know your measurement, finding the right fit becomes effortless. Now that you know your size, you’re ready to find the perfect hat and wear it with confidence.

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