One of the most common men's sizes, a 101 cm chest is US 40 and the second body carried under INT M, so an M can mean a 96 or a 101 cm chest.
EU to US conversion
A men's EU jacket size is ten more than the US one, so EU 50 is US 40 and EU 54 is US 44 across the whole chart. EU counts the half-chest in centimetres while US counts the full chest in inches, and for this size range the two happen to sit a flat ten apart. Because the EU number is roughly the chest in centimetres halved, it stays closer to an actual measurement than the US inch label, which drifts by brand.
At this size, EU to US
One size up from EU 50, US moves 2 to US 42 while EU rises 2 to EU 52, holding their spacing. Both EU 50 and US 40 are whole numbers here, so nothing rounds. For EU 50, the US column here runs US 38, US 40, US 42, stepping two numbers at a time.
Size Chart EU UK US INT 44 34 34 XS 46 36 36 S 48 38 38 M 50 40 40 M 52 42 42 L 54 44 44 L 56 46 46 XL
Frequently Asked Questions Does EU 50 round up or down in US? Round to the chest for a jacket and to the larger figure if chest and waist disagree; a drop-two cut assumes a smaller waist, which not every body follows.
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Note UK and US men's sizes are typically identical EU sizes are approximately UK + 10 Fit varies by garment type - jackets vs shirts vs casual Clothing sizes vary significantly by brand See a number that looks off? Report an error on this page.