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Hat Sizing Chart: How to Measure Your Head and Find Your Hat Size

Get the perfect fit every time—measure once, shop confidently, and enjoy hats that feel as good as they look. Finding your correct hat size is the key to all-day comfort. A properly fitting hat should feel snug but not tight, sit securely without slipping, and never cause pressure or headaches.

How to Measure Your Head for a Hat

Measure your head where you want the hat to sit—generally just above your ears and eyebrows.

  • Use a soft measuring tape for the most accurate result.
  • No tape? Use a string, mark the length, then measure it on a ruler.

What This Hat Size Chart Includes

Our hat sizing chart helps you convert your measurement across formats, including:

  • Inches
  • Centimeters (cm)
  • Fitted hat sizes
  • Size ranges for easy fit, stretch fit, and one size fits most (OSFM) hats

Between Sizes? Choose the Larger Size

If your measurement falls between two sizes, we recommend choosing the larger size. You can fine-tune the fit easily with a size-reducing tape or choose an adjustable-size hat.

One Size Fits Most: What It Typically Means

  • Most women’s OSFM hats are approximately 57 cm (Medium)
  • Most men’s OSFM hats are approximately 59 cm (Large)
    We often note when a style runs larger and specify the maximum size it will fit.

Why Fit Can Vary by Brand and Style

Hat fit isn’t only about circumference. Sizing can vary slightly by brand, and the “feel” can change depending on:

  • Material: soft vs. structured/stiff crowns
  • Inner band type: elasticized, cotton, leather, etc.
  • Hat style: caps, fedoras, wide brims, bucket hats, etc.
  • How you wear it: if you like a hat tilted back, measure along that exact path

The best approach is simple: measure where you wear, choose the larger size if you’re between sizes, and adjust down if needed.

Now that you have your hat size

Find the perfect hat

Petite Women's Hats are available in XXS, XS and small sizes

One size fits most women's hats are medium, 57 cm.

Plus size women's hats are available in large and X-large sizes.

Men's hats are available in small, medium, large, XL, 2XL and 3XL sizes.

Men's one size fits most hats are large/x-large size, 59-60 cm.

You can use the filters on the sidebar or by clicking on the hamburger on a mobile device.