What is a US 40 jacket in EU sizing?

A US 40 chest is an EU 50. The European number is the chest in inches plus 10.

What do R, S and L mean on suit jackets?

They indicate length: Short, Regular and Long. They adjust body and sleeve length without changing the chest measurement.

Should a winter coat be a size up?

Yes — allow one size for layering if you wear knitwear underneath.

Converters

Jacket & Coat Size Converter

Tailored jackets are sized by chest measurement, which makes them one of the easier garments to convert — as long as you know whether the number is inches or centimetres.

Men's Jackets size chart

Men's Jackets size chart
INTL	US	UK	EU	AU	JP	KR	CN	IN	CA	MX	BR	IT	FR	RU	TR	ZA	Chest (in)	Chest (cm)
XS	32	32	42	32	S	90	165/84	XS	32	XS	42	42	42	42	42	32	32	81
S	34	34	44	34	S	95	170/88	S	34	S	44	44	44	44	44	34	34	86
S	36	36	46	36	M	95	170/92	S	36	S	46	46	46	46	46	36	36	91
M	38	38	48	38	M	100	175/96	M	38	M	48	48	48	48	48	38	38	97
M	40	40	50	40	L	105	175/100	M	40	M	50	50	50	50	50	40	40	102
L	42	42	52	42	L	110	180/104	L	42	L	52	52	52	52	52	42	42	107
L	44	44	54	44	LL	115	180/108	L	44	L	54	54	54	54	54	44	44	112
XL	46	46	56	46	3L	120	185/112	XL	46	XL	56	56	56	56	56	46	46	117
XXL	48	48	58	48	4L	125	185/116	XXL	48	XXL	58	58	58	58	58	48	48	122
3XL	50	50	60	50	5L	130	190/120	3XL	50	3XL	60	60	60	60	60	50	50	127

How to use this converter

Pick the garment category you are shopping for.
Choose the country or size system you already know, then the one you want to convert to.
Select your size — every supported country updates instantly.
Check the body-measurement columns to confirm the fit, then copy, print or share the result.

Why sizes differ between countries

Size labels come from national fit blocks developed decades ago from different population surveys. The US and UK use garment-based numbering, most of Europe derives sizes from body measurements in centimetres, and Japan, Korea and China use their own regional standards. Because no global standard exists, matching your measurements to the chart is always more reliable than matching the label.

Frequently asked questions

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