Cap Size Conversion Chart
Official cap size conversion chart. Convert fitted hat sizes to inches and CM. Find your correct cap size for all major brands.
Reference Table
Complete size conversion chart
| US | UK | EU | Inches | CM | AU | JP |
|---|---|---|---|---|---|---|
| 6 1/4 | 6 1/8 | 50 | 19.625 | 50 | 50 | XS |
| 6 3/8 | 6 1/4 | 51 | 20 | 51 | 51 | XS |
| 6 1/2 | 6 3/8 | 52 | 20.375 | 52 | 52 | XS |
| 6 5/8 | 6 1/2 | 53 | 20.75 | 53 | 53 | S |
| 6 3/4 | 6 5/8 | 54 | 21.25 | 54 | 54 | S |
| 6 7/8 | 6 3/4 | 55 | 21.625 | 55 | 55 | S |
| 7 | 6 7/8 | 56 | 22 | 56 | 56 | M |
| 7 1/8 | 7 | 57 | 22.375 | 57 | 57 | M |
| 7 1/4 | 7 1/8 | 58 | 22.75 | 58 | 58 | L |
| 7 3/8 | 7 1/4 | 59 | 23.125 | 59 | 59 | L |
| 7 1/2 | 7 3/8 | 60 | 23.5 | 60 | 60 | LL |
| 7 5/8 | 7 1/2 | 61 | 23.875 | 61 | 61 | LL |
| 7 3/4 | 7 5/8 | 62 | 24.25 | 62 | 62 | 3L |
| 7 7/8 | 7 3/4 | 63 | 24.625 | 63 | 63 | 3L |
| 8 | 7 7/8 | 64 | 25 | 64 | 64 | 4L |
📏 How to Measure Your Head
1. Proper Tape Placement
The most important step for an accurate fit:
- Place tape about 1 inch (2.5cm) above eyebrows.
- Ensure tape is just above your ears.
- Keep the tape level all the way around.
2. Know Your Head Shape
Shape affects fit as much as size:
- Long Oval: Longer front-to-back (most common).
- Round Oval: More circular shape.
- If you have a round head, you might need to size up.
💡 Fit Check: Tight vs. Right
Comfort is key!
A hat should sit comfortably above your ears without leaving red marks on your forehead. It should be snug enough to stay on in a breeze, but loose enough to not give you a headache.
✓ Correct: Level, comfortable, no pressure
✗ Incorrect: Too high, red marks, headache
Frequently Asked Questions
💡Quick Answer
Fitted caps use specific sizing (e.g., 7 1/4), while adjustable caps (snapbacks) fit a range. A standard "One Size Fits Most" cap typically fits heads from 21.5 to 23 inches.
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