International conversions Nov 2, 2026 4 min read
Men's Suit Size Conversion (US, EU, UK, Italy)
Suit sizes track chest in inches (US/UK) or cm (EU). Italian sizing adds +6 from US (US 40 = IT 50). Drop indicates jacket-trouser difference.
The Chart
| US Chest | UK | EU | Italy | Drop |
|---|---|---|---|---|
| 36 | 36 | 46 | 46 | 6 (waist 30) |
| 38 | 38 | 48 | 48 | 6 (waist 32) |
| 40 | 40 | 50 | 50 | 6 (waist 34) |
| 42 | 42 | 52 | 52 | 6 (waist 36) |
| 44 | 44 | 54 | 54 | 6 (waist 38) |
| 46 | 46 | 56 | 56 | 6 (waist 40) |
| 48 | 48 | 58 | 58 | 6 (waist 42) |
| 50 | 50 | 60 | 60 | 6 (waist 44) |
FAQs
What does 'drop' mean in suit sizing?
Drop = chest minus waist. Standard drop is 6 (size 40R has 30" waist trouser). Athletic cut has drop 7-8. Stout/portly cut has drop 4-5. Pick suit by chest, then verify drop matches your waist.
Italian sizing — why +6?
Italian suit sizing uses chest in cm (chest 100cm = IT 50). The +6 vs US is just a numeric coincidence. Italian-made suits fit similarly to American-made at the equivalent size. Slim-cut Italian models may run small.
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