US to EU Suit Size Conversion
| US/UK Chest (in) | EU Size |
|---|---|
| 36 | 46 |
| 38 | 48 |
| 40 | 50 |
| 42 | 52 |
| 44 | 54 |
| 46 | 56 |
| 48 | 58 |
Sizing conventions vary by brand and by cut — this table shows the standard published conversion. Always check the garment's own size chart when one is available. See how these tables are compiled.
A US 40 suit jacket (chest measured in inches) converts to a EU 50 on the standard chart, following the men's suit industry's standard offset of ten between the US/UK chest-inch number and the EU size.
Suit fit depends heavily on drop (the difference between chest and waist measurement) as well as chest size, so this chest conversion is only the first of two numbers a tailored-fit shopper needs — the drop and cut vary by brand in ways this table doesn't cover.
Frequently asked questions
Is the US-to-EU suit size gap always exactly ten?
On the standard chart, yes — EU suit sizes run ten points above the US/UK chest-inch number throughout this range. Drop and cut still vary by brand beyond that base conversion.