25 inches to hat size
Divide the head circumference by pi: 25 ÷ 3.1416 = 7.96. The nearest eighth is 8, so a 25-inch head wears a size 8. That is UK 7 ⅞, EU 64 and usually a letter size 3XL.
| Fitted size | cm | Inches | UK | Letter |
|---|---|---|---|---|
| 6 ½ | 51.9 | 20 ⅜ (20.42) | 6 ⅜ | XS |
| 6 ⅝ | 52.9 | 20 ⅞ (20.81) | 6 ½ | XS |
| 6 ¾ | 53.9 | 21 ¼ (21.21) | 6 ⅝ | S |
| 6 ⅞ | 54.9 | 21 ⅝ (21.6) | 6 ¾ | S |
| 7 | 55.9 | 22 (21.99) | 6 ⅞ | M |
| 7 ⅛ | 56.9 | 22 ⅜ (22.38) | 7 | M |
| 7 ¼ | 57.9 | 22 ¾ (22.78) | 7 ⅛ | L |
| 7 ⅜ | 58.8 | 23 ⅛ (23.17) | 7 ¼ | L |
| 7 ½ | 59.8 | 23 ½ (23.56) | 7 ⅜ | XL |
| 7 ⅝ | 60.8 | 24 (23.95) | 7 ½ | XL |
| 7 ¾ | 61.8 | 24 ⅜ (24.35) | 7 ⅝ | XXL |
| 7 ⅞ | 62.8 | 24 ¾ (24.74) | 7 ¾ | XXL |
| 8 | 63.8 | 25 ⅛ (25.13) | 7 ⅞ | 3XL |
| 8 ⅛ | 64.8 | 25 ½ (25.53) | 8 | 3XL |
| 8 ¼ | 65.8 | 25 ⅞ (25.92) | 8 ⅛ | 3XL |
25-inch head: size by brand
Brands that sell stretch-fit or letter sizes use ranges. For a head of exactly this size:
- New Era 59FIFTY: 8
- Flexfit: XXL
- Nike: L/XL
- Stetson: 3XL
- Melin: XL
- Kangol: XXL
Related sizes
Fit tips
- Measure with the tape where the hat will sit: across the middle of the forehead and about 1 cm above the ears.
- If your tape reads a little over 25 inches, use the exact number in the calculator. Every eighth of an inch of diameter is about ⅜ inch of circumference.
- Round up for fitted caps and felt hats. Round down for stretch-fit caps and beanies.