Men’s Hat Size Chart
Hat sizes come from one measurement: the circumference of your head just above the ears and eyebrows. Enter it in inches or centimetres and the calculator gives your fitted hat size (such as 7⅜), letter size, metric size and UK size, and shows what fits best for fitted caps, adjustable caps, fedoras, beanies and more.
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Hat size calculator
Hat Sizing Pack
Printable hat size conversion chart (US, UK, metric, letter), a printable measuring tape, a hat care guide and a family hat size record.
- Size chart (PDF/XLSX)
- Measuring tape (PDF)
- Care guide (PDF)
- Family sizes (XLSX)
Formats: PDF, XLSX. Instant download after payment (link valid 72 hours, up to 5 downloads). AI-assisted: the templates were drafted with AI help and reviewed and laid out before publishing.
$3.00 USD, one-time 4 files · about $0.75 each
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- 7-day refund
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7-day money-back guarantee. Full refund within 7 days of purchase, even after you download.
Free sample: Family Hat Sizes (PDF, 94 KB)
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Free printables
Single sheets you can print right now, no sign-up. The full pack adds every sheet in one download plus the editable files.
Printable Family Hat Size ChartMen’s hat size chart
| US fitted size | Inches | Centimetres | Letter |
|---|---|---|---|
| 6¾ | 21.25 | 54 | S |
| 6⅞ | 21.625 | 55 | S |
| 7 | 22 | 56 | M |
| 7⅛ | 22.375 | 57 | M |
| 7¼ | 22.75 | 58 | L |
| 7⅜ | 23.125 | 59 | L |
| 7½ | 23.5 | 60 | XL |
| 7⅝ | 23.875 | 61 | XL |
| 7¾ | 24.25 | 62 | XXL |
| 7⅞ | 24.625 | 63 | XXL |
| 8 | 25 | 64 | XXL |
US fitted hat sizes are roughly the head’s diameter in inches: the circumference divided by π and rounded to the nearest eighth. Metric sizes are simply the circumference in centimetres. UK sizes run about an eighth smaller than US sizes for the same head. Letter sizes vary by brand; treat them as a guide.
How to measure your head
- Use a soft tape measure (or a piece of string and a ruler).
- Place it around your head about ⅛ inch (3 mm) above the ears and across the middle of the forehead, just above the eyebrows.
- Keep it level and snug but not tight — where a hat would sit.
- Measure twice and use the larger measurement.
- If you have thick hair or wear your hair up, measure the way you’ll usually wear the hat.
Fit by hat style
| Style | Fit advice |
|---|---|
| Fitted baseball cap | Use your exact size; many brands also sell S/M, L/XL flex-fit sizes |
| Adjustable cap (snapback, strapback) | Usually one size fits about 21¾–23⅞ in |
| Fedora, trilby, felt hats | Order your size; a snug fit is secure; sizing tape can reduce a loose hat slightly |
| Straw hats (panama) | Choose your size or slightly up — straw does not stretch |
| Beanies and knit hats | Stretch to fit most heads; check length for slouchy styles |
| Flat caps | Sized like fitted hats; a fraction larger is comfortable |
| Helmets | Follow the maker’s chart; safety depends on a correct fit |
Between sizes?
Choose the larger size for firm hats that won’t stretch, and add a strip of hat sizing tape or foam behind the sweatband if it is slightly loose. Felt and wool hats can sometimes be stretched a little by a hatter. A hat that is too tight causes headaches and leaves a red mark; one that is too loose blows off in the wind.
Worked example
A head that measures 23 inches (58.4 cm) gives 23 ÷ π = 7.32, which rounds to 7⅜ — letter size L, metric 58 and UK 7¼. For a fitted baseball cap, order 7⅜; for an adjustable cap, any standard size will fit; for a straw panama, 7⅜ or 7½ if between.
Hat care tips
- Store felt hats upside down on the crown or on a hat stand to keep the brim shape.
- Brush felt hats in the direction of the nap.
- Let sweatbands dry naturally after wear.
- Keep straw hats away from moisture; they can lose shape.
- Spot-clean caps; avoid the dishwasher, which can warp brims.
Why sizes differ between brands
Hat sizes are measured at the inside of the sweatband, but crown shape, sweatband thickness and the material all change how a hat feels. Many heads are more oval than round, so a long-oval head may find one brand’s 7⅜ snug at the front and back while another fits perfectly. Stretch fabrics in flex-fit caps cover a range of sizes, while stiff straw and felt have almost no give. When a brand publishes its own chart, trust it over a general chart like this one.
Adjusting a hat that does not quite fit
| Problem | Fix |
|---|---|
| Slightly loose | Add hat sizing tape or a foam strip behind the sweatband |
| Slightly tight felt hat | A hatter can stretch it a little with steam and a hat stretcher |
| Tight cap | Try the next size or a flex-fit/adjustable style |
| Hat sits too high | Usually too small — go up one size |
| Hat drops over the eyes | Usually too large — go down one size or add tape |
Sizes for common cap styles
Many flex-fit caps come in S/M (about 6⅞–7¼) and L/XL (about 7⅛–7⅝), and some ranges add XL/XXL for 7⅝–8. Snapback and strapback caps usually adjust from about 21¾ to 23⅞ inches. Knit beanies stretch across a wide range, though very large heads may prefer “tall” or “XL” beanies for enough depth.
Kids’ and women’s hat sizes
The same measuring method and conversion work for everyone. Children’s heads typically measure 18–21 inches, and women’s hats are often sized in the same inch or centimetre system, sometimes with letter sizes that run smaller than men’s. Always check the brand’s chart.
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Frequently asked questions
What size hat is 23 inches?
About a US 7⅜ (58 cm).
How do I convert head circumference to hat size?
Divide the circumference in inches by π (3.14) and round to the nearest ⅛.
What is a size 7¼ hat in cm?
About 58 cm.
What size is a large hat?
Typically 7⅜–7½ or 59–60 cm, but brands vary.
Should a hat be tight or loose?
Snug but comfortable, without leaving a mark.
What if my head measures between sizes?
Choose the larger size for firm hats and add sizing tape if needed.
Does hair length affect hat size?
Yes, thick or long hair worn under the hat can add up to about an eighth of a size, so measure with your usual hairstyle.
What are UK hat sizes?
About an eighth smaller than US sizes for the same head.
Is my data stored?
No, it runs in your browser.