EU suit to US / UK suit size
The short answer
By the formula, EU suit 54 is US / UK suit 44.
A US or UK jacket size is the chest in inches; the continental size is that number plus 10. Length letters (S, R, L) are a separate code and do not convert by number.
| EU suit | US / UK suit |
|---|---|
| 44 | 34 |
| 46 | 36 |
| 48 | 38 |
| 50 | 40 |
| 52 | 42 |
| 54 | 44 |
| 56 | 46 |
| 58 | 48 |
| 60 | 50 |
| 62 | 52 |
| 64 | 54 |