Men's Clothing Size Converter

Shopping from international brands? Convert men's clothing sizes between US/UK, European, Japanese, and Korean sizing systems instantly. Includes letter sizes (XS-3XL) mapped to numeric equivalents.

Quick Converter

I know my size in

My size

Letter	US/UK	EU	JP	KR	Chest (in)
XS	34	44	SS	85	34-36
S	36	46	S	90	36-38
M	38-40	48-50	M	95	38-40
L	42	52	L	100	42-44
XL	44	54	LL	105	44-46
XXL	46	56	3L	110	46-48
3XL	48	58	4L	115	48-50

Click any row to highlight it. Sizes are approximate and may vary by brand.

Understanding Each Sizing System

US/UK Numeric Sizes

Based on chest circumference in inches. A US/UK 38 means the jacket or shirt is designed for a 38-inch chest. Letter sizes (S, M, L) map to these numeric ranges but can vary by brand.

EU Sizing

European sizes use even numbers derived from half the chest circumference in centimeters. A 100 cm chest equals EU 50. Italian and German sizing follow this same standard.

Japanese Sizing

Japan uses letter-based sizes (SS, S, M, L, LL, 3L, 4L) where SS is extra small and LL is extra large. Japanese cuts are typically slimmer and shorter in the torso and sleeves than Western equivalents.

Korean Sizing

Korean sizes directly represent the chest measurement in centimeters (85, 90, 95, etc.). Korean fashion tends toward a slim, tailored fit, so the actual garment dimensions may be smaller than Western brands at the same measurement.

How to Measure Yourself

Grab a soft tape measure and take these key measurements over a thin t-shirt for the most accurate results.

Chest

Stand relaxed with arms at your sides. Wrap the tape around the fullest part of your chest, just under your armpits and across the shoulder blades. Keep the tape level and snug without compressing.

Waist

Measure around your natural waistline, located just above the hip bones and below the navel. Do not hold your breath or suck in; stand naturally for an honest measurement.

Neck

Measure around the base of your neck where a shirt collar would sit. You should be able to fit one finger between the tape and your neck for a comfortable dress shirt fit.

Frequently Asked Questions

Are US and UK men's clothing sizes the same?

For most casual clothing like t-shirts, sweaters, and jackets, US and UK men's sizes are essentially the same. Both use the same letter sizing (S, M, L, XL) and numeric chest measurements. The main difference appears in dress shirts, where collar sizes may be measured in inches (US) versus centimeters (UK), and in trousers where the cut and rise can differ between American and British brands.

How do European men's sizes work?

European sizing uses even numbers typically starting at 44 (XS) and going up to 58+ (3XL). The EU number is derived from half the chest circumference in centimeters, then rounded. So a 96 cm (38 in) chest translates to roughly EU 48. Italian sizing is generally the same as standard EU, while French sizing can occasionally differ by 2 for jackets.

What does the Korean sizing number mean?

Korean (KR) sizes represent the chest measurement in centimeters. A KR 95 means the garment is designed for a 95 cm chest. This straightforward system makes it easy to find your size once you know your metric chest measurement. Korean brands generally fit slimmer than Western brands at the same numeric measurement.

Should I size up when buying from Asian brands?

As a general guideline, yes. Japanese and Korean brands tend to have slimmer, shorter cuts compared to Western brands. If you normally wear a US Medium, consider ordering a Large from Japanese or Korean retailers. Always check the brand's specific size chart and pay attention to garment measurements rather than relying solely on letter sizes.