Hat Size Chart Fitted
Fitted caps are sized by numbers like 7 ¼ or 7 ⅜ that come from your head circumference. Measure your head, enter it here, and see your fitted size, the letter size and the UK equivalent — plus the full hat size chart and tips for choosing between two sizes.
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Fitted hat size finder
| Fitted size | Inches | cm | Letter | UK |
|---|
Hat Size Measuring Kit
Printable paper measuring tape for heads, a full hat size conversion chart (US, UK, cm, letter), a family size record card and a cap buying checklist.
- Printable measuring tape (PDF)
- Hat size chart (PDF, XLSX)
- Family size card (PDF, DOCX, XLSX)
- Buying checklist (PDF, DOCX)
Formats: PDF, XLSX, DOCX. 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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Free sample: Cap Buying Checklist (PDF, 48 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 Fitted Hat Buying ChecklistHow fitted hat sizes work
US fitted hat sizes are based on the diameter of a circle with the same circumference as your head: hat size ≈ head circumference in inches ÷ π (3.14). A 22¾ inch head gives 22.75 ÷ 3.14 = 7.24, which rounds to size 7¼. Sizes go up in eighths of an inch, and each eighth adds about ⅜ inch (1 cm) of circumference. That is why a single size step makes a noticeable difference in how a fitted cap feels.
Fitted hat size chart
| Fitted size | Head (inches) | Head (cm) | Letter |
|---|---|---|---|
| 6 1/2 | 20.4 | 52 | S |
| 6 5/8 | 20.8 | 53 | S |
| 6 3/4 | 21.2 | 54 | S |
| 6 7/8 | 21.6 | 55 | M |
| 7 | 22.0 | 56 | M |
| 7 1/8 | 22.4 | 57 | L |
| 7 1/4 | 22.8 | 58 | L |
| 7 3/8 | 23.1 | 59 | XL |
| 7 1/2 | 23.5 | 60 | XL |
| 7 5/8 | 23.9 | 61 | XXL |
| 7 3/4 | 24.3 | 62 | XXL |
| 7 7/8 | 24.7 | 63 | 3XL |
| 8 | 25.1 | 64 | 3XL |
| 8 1/8 | 25.5 | 65 | 3XL |
| 8 1/4 | 25.9 | 66 | 3XL |
Letter sizes (S, M, L, XL) are used for stretch-fit and adjustable styles and vary between brands; the numbered sizes are more consistent. UK hat sizes are usually one eighth smaller than US sizes for the same head — a US 7¼ is roughly a UK 7⅛.
How to measure your head
- Use a soft tape measure, or a piece of string and a ruler.
- Wrap it around your head where a cap sits: about ⅛ inch (3 mm) above the eyebrows and ears, around the widest part at the back.
- Keep the tape level and snug but not tight.
- Read the measurement where the tape meets, in centimetres or inches.
- Measure two or three times and use the largest reading.
If you are between sizes, choose the larger size for comfort or if you have thick hair; choose the smaller size for a secure fit in wind or during sport. Many people find the paid pack’s printable measuring tape useful if they do not own a soft tape.
Fitted, stretch-fit and adjustable caps
| Type | How it fits | Sizing |
|---|---|---|
| Fitted | Closed back, exact size | Numbered sizes such as 7⅛, 7¼ |
| Stretch-fit | Elastic band in the sweatband | Ranges such as S/M, M/L, L/XL |
| Snapback / strapback | Adjustable closure | One size fits most, roughly 21–24 inches |
| Youth caps | Smaller crown | About 6½–7 or youth one-size |
Check each brand’s size chart: a stretch-fit M/L from one brand may cover a different range from another.
Worked example
A head measuring 57.5 cm is 22.64 inches. Dividing by π gives 7.21, so the fitted size is 7¼ (58 cm). In letter sizing that is usually a large, and in UK sizing about 7⅛. If the cap is a structured wool fitted cap, the person might choose 7¼; for a softer cap they wear in hot weather, 7⅜ could feel more relaxed. For a stretch-fit style, they would pick L/XL or M/L depending on the brand’s range.
Getting the right fit
- A fitted cap should sit snugly without leaving a red mark on your forehead after an hour.
- New caps can feel tight and may stretch slightly with wear; wool stretches more than polyester.
- Caps that are too big slide down over the eyes or blow off; a thin sizing tape inside the sweatband can take up a little extra room.
- Hair length and style change the fit — measure with your usual hairstyle.
- Children’s heads grow quickly; measure again before each purchase.
Measuring children and between-size heads
Children’s heads grow fastest in the first years; a toddler may go up a size within months. Measure before every purchase and allow a little room, but avoid caps so big that they cover the eyes. For adults who measure between two sizes, try both if you can: brands differ in crown depth and sweatband thickness, and a size that fits one brand perfectly may be tight in another. When buying online, check the brand’s own chart in centimetres rather than relying on the size number alone.
Caring for caps
Spot-clean fitted caps with mild soap and cool water, and let them air-dry on a form or a rolled towel to keep the shape. Avoid hot washes and dryers, which can shrink wool and warp brims. Store caps where the crown will not be crushed.
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Frequently asked questions
How do I find my fitted hat size?
Measure your head circumference in inches and divide by 3.14, then round to the nearest eighth.
What size is a 7 1/4 fitted hat?
About 22¾ inches or 58 cm head circumference.
What is the most common fitted hat size?
Many adult men fall between 7⅛ and 7⅜; sizes vary widely.
What letter size is 7 3/8?
Usually L or XL depending on the brand.
Should I size up or down between sizes?
Up for comfort or thick hair; down for a secure fit during sport.
Are UK hat sizes the same as US?
No, UK sizes are usually one eighth smaller for the same head.
What hat size is 60 cm?
A 60 cm head is about 23½ inches, a US fitted size 7½, usually XL.
Do hats shrink?
Wool and cotton caps can shrink if washed hot or tumble-dried; spot-clean and air-dry to keep the size.