Men's INT to UK Clothing Size Chart
| INT | UK | EU |
|---|---|---|
| XS | 34 | 44 |
| S | 36 | 46 |
| M | 38 | 48 |
| M | 40 | 50 |
| L | 42 | 52 |
| L | 44 | 54 |
| XL | 46 | 56 |
| XL | 48 | 58 |
| XXL | 50 | 60 |
| XXL | 52 | 62 |
UK and US men's clothing sizes are identical, so the US column matches UK.
Letter sizes (XS to XXL) in numbers
| Size | US | UK | EU |
|---|---|---|---|
| XS | 34 | 34 | 44 |
| S | 36 | 36 | 46 |
| M | 38-40 | 38-40 | 48-50 |
| L | 42-44 | 42-44 | 52-54 |
| XL | 46-48 | 46-48 | 56-58 |
| XXL | 50-52 | 50-52 | 60-62 |
Plus and extended sizes
| US | Letter | UK | EU | Chest (cm) |
|---|---|---|---|---|
| 54-56 | 3XL | 54-56 | 64-66 | 136-141 |
| 58-60 | 4XL | 58-60 | 68-70 | 146-151 |
| 62-64 | 5XL | 62-64 | 72-74 | 156-161 |
Note: Men's big-and-tall letter sizes are not fully standardised: some makers shift the whole ladder up, labelling a 46 to 48 inch chest as 2XL instead of XL, so these are the most common convention rather than a fixed rule. Chest in centimetres continues the site's own chart at about 5 cm per two inches.
Sources
- American Roots, men's size chart (americanrootswear.com): letter to chest-inch ladder S to 5XL
- sizeguide.net, men's size chart with chest in inches and centimetres to XXXL
- Big Fish Clothing, Big and Tall size guide (bigfishclothing.co.uk): documents the shifted big-and-tall letter ladder
- Wikipedia, US standard clothing size (references ASTM D6240 for men, chest 34 to 60)
International letters and the British chest number
Letter sizes are bands, not single points: on this chart a size such as INT L lines up with 2 neighbouring UK numbers, so the same letter can round either way between them. The table shows every UK value each band covers.
Each men's letter spans a pair of British chest numbers, so the fit sits in a band. Because the underlying figure is the chest, the letter inherits a solid base, but the room around it is a design decision the size cannot show. That is the gap between buying a shirt and a jacket at the same letter. Reading the chest number the letter covers, then checking the brand's own ease, turns a vague S or M into a size that actually fits the shoulders.
Common questions
Does one men's letter equal one UK number?
No. A letter covers two neighbouring chest numbers, which the table lays out so you can match your own measurement.
Why do same-letter garments fit so differently?
Ease varies by garment. A slim shirt and a tailored jacket at the same letter are built with different room on the same chest.
Men's clothing size charts · How to measure your body · Asian clothing sizes · Vanity sizing
Sources
Voluntary garment standard: EN 13402 Parts 1 to 3.
German sizing formulas: de.wikipedia.org, Konfektionsgroesse; blitzrechner.de.