Men’s hat size conversion chart
Men’s and women’s hats use the same size scale; the difference is which sizes are stocked. Men’s hats typically run from 6 ¾ (54 cm) to 8 (64 cm), and most men wear 7 ⅛ to 7 ⅜.
| cm | Inches | US | UK | Letter |
|---|---|---|---|---|
| 53 | 20 ⅞ | 6 ⅝ | 6 ½ | XS |
| 54 | 21 ¼ | 6 ¾ | 6 ⅝ | S |
| 55 | 21 ⅝ | 6 ⅞ | 6 ¾ | S |
| 56 | 22 | 7 | 6 ⅞ | M |
| 57 | 22 ½ | 7 ⅛ | 7 | M |
| 58 | 22 ⅞ | 7 ¼ | 7 ⅛ | L |
| 59 | 23 ¼ | 7 ⅜ | 7 ¼ | L |
| 60 | 23 ⅝ | 7 ½ | 7 ⅜ | XL |
| 61 | 24 | 7 ⅝ | 7 ½ | XL |
| 62 | 24 ⅜ | 7 ¾ | 7 ⅝ | XXL |
| 63 | 24 ¾ | 7 ⅞ | 7 ¾ | XXL |
| 64 | 25 ¼ | 8 | 7 ⅞ | 3XL |
| 65 | 25 ⅝ | 8 ⅛ | 8 | 3XL |
| 66 | 26 | 8 ¼ | 8 ⅛ | 3XL |
Average men’s hat size
The average adult male head is about 57.5 cm (22 ⅝ in), which is a fitted 7 ¼ and a Large in most letter sizing. About 7 in 10 men wear 7 to 7 ⅜. Only about 4% of men measure 7 ⅝ or larger, and they will find better choice in brands with extended sizes such as New Era (to 8 ¼) and western hat makers (to 8).
Hat sizes for big heads
If you measure 62 cm (24 ⅜ in) or more, look for hats marked 7 ¾, 7 ⅞, 8 or XXL. Flexfit XXL fits up to 64 cm. New Era 59FIFTY goes to 8 ¼ (65.4 cm). Snapbacks marked One Size usually stop around 62 cm, so a big-head snapback should say XL or L/XL.
Fit tips
- Short hair or a shaved head: buy the exact size or go down ⅛ for stretch styles.
- Long or thick hair: measure over the hair, not under it.
- A hat that fits should leave no mark after 15 minutes.