Convert Hat Size to CM
Find out the head circumference in centimeters for any hat size. Convert US, UK, or EU hat sizes to CM measurements.
Size Converter
Enter your hat size or head circumference
Converted Sizes
Reference Table
| CM | ||||||
|---|---|---|---|---|---|---|
| 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 |
Frequently Asked Questions
📏 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
💡Quick Answer
A US Size 7 hat fits a head circumference of approximately 56cm. A Size 7 1/2 fits around 60cm. Use the tool below to find the CM equivalent for any hat size.
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