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UK to EU men’s clothing sizes
For suits and jackets add 10 to the UK size (a 40 is an EU 50); for trousers add 16 to the waist (a 32 is an EU 48); for shirts the EU size is roughly the collar in centimetres (15.5 inches is EU 39). UK and US men’s sizes use the same numbers.
Men’s tailoring is sized by measurement in inches, so UK and US labels match and only the EU number needs converting.
By Sienna Stones · Published 2 November 2026
Suits and jackets
| UK / US chest (in) | EU | Chest (cm) |
|---|---|---|
| 34 | 44 | 86 |
| 36 | 46 | 91 |
| 38 | 48 | 97 |
| 40 | 50 | 102 |
| 42 | 52 | 107 |
| 44 | 54 | 112 |
| 46 | 56 | 117 |
| 48 | 58 | 122 |
| 50 | 60 | 127 |
| 52 | 62 | 132 |
| 54 | 64 | 137 |
| 56 | 66 | 142 |
| 58 | 68 | 147 |
- UK 34 suit or jacket is an EU 44, for a chest of about 86 cm.
- UK 36 suit or jacket is an EU 46, for a chest of about 91 cm.
- UK 38 suit or jacket is an EU 48, for a chest of about 97 cm.
- UK 40 suit or jacket is an EU 50, for a chest of about 102 cm.
- UK 42 suit or jacket is an EU 52, for a chest of about 107 cm.
- UK 44 suit or jacket is an EU 54, for a chest of about 112 cm.
- UK 46 suit or jacket is an EU 56, for a chest of about 117 cm.
- UK 48 suit or jacket is an EU 58, for a chest of about 122 cm.
- UK 50 suit or jacket is an EU 60, for a chest of about 127 cm.
- UK 52 suit or jacket is an EU 62, for a chest of about 132 cm.
- UK 54 suit or jacket is an EU 64, for a chest of about 137 cm.
- UK 56 suit or jacket is an EU 66, for a chest of about 142 cm.
- UK 58 suit or jacket is an EU 68, for a chest of about 147 cm.
That British Tweed Company, Moss and sizechart.uk all print EU as the UK/US number plus 10. Moss rounds the centimetres slightly differently (87 cm at 34, 92 cm at 36), so treat them as accurate to about 1 cm. Length (short, regular, long) is chosen separately. Letter sizes are not standardised: sizechart.uk maps M to 38 to 40, while Next lists M as a 39 to 41 inch chest.
Trousers
| UK / US waist (in) | EU | Waist (cm) |
|---|---|---|
| 28 | 44 | 71 |
| 30 | 46 | 76 |
| 32 | 48 | 81 |
| 34 | 50 | 86 |
| 36 | 52 | 91 |
| 38 | 54 | 97 |
| 40 | 56 | 102 |
| 42 | 58 | 107 |
| 44 | 60 | 112 |
| 46 | 62 | 117 |
- 28 inch waist is an EU 44 (71 cm).
- 30 inch waist is an EU 46 (76 cm).
- 32 inch waist is an EU 48 (81 cm).
- 34 inch waist is an EU 50 (86 cm).
- 36 inch waist is an EU 52 (91 cm).
- 38 inch waist is an EU 54 (97 cm).
- 40 inch waist is an EU 56 (102 cm).
- 42 inch waist is an EU 58 (107 cm).
- 44 inch waist is an EU 60 (112 cm).
- 46 inch waist is an EU 62 (117 cm).
That British Tweed Company and sizechart.uk agree on the EU numbers. Next rounds to the nearest half centimetre (81.5 cm at 32, 86.5 cm at 34). This table is for tailored trousers; jeans are usually labelled by waist and leg (for example 32 W 32 L) and often run a little larger than the tape measurement.
Shirt collars
| UK / US collar (in) | Collar (cm) | EU shirt size |
|---|---|---|
| 14.5 | 37 | 37 |
| 15 | 38 | 38 |
| 15.5 | 39.5 | 39 |
| 16 | 40.5 | 41 |
| 16.5 | 42 | 42 |
| 17 | 43–43.5 | 43 |
| 17.5 | 44.5 | 44–44.5 |
| 18 | 45.5 | 45.5–46 |
- 14.5 inch collar is an EU 37.
- 15 inch collar is an EU 38.
- 15.5 inch collar is an EU 39.
- 16 inch collar is an EU 41.
- 16.5 inch collar is an EU 42.
- 17 inch collar is an EU 43.
- 17.5 inch collar is an EU 44–44.5.
- 18 inch collar is an EU 45.5–46.
John Lewis and Charles Tyrwhitt (EU site) agree on collar centimetres except at 17 inches (43.5 and 43). EU labels are rounded by hand: sizechart.uk lists 44 at 17.5 inches and 46 at 18 inches, while Charles Tyrwhitt lists 44.5 and 45.5. Sleeve length is a separate measurement.
Why brands still vary
A conversion maps one label to another; it cannot know how a brand cuts. A slim-fit and a classic-fit jacket can share the size 40 label and leave very different room across the chest, and stretch fabric changes how a waist size feels.
How to measure yourself
- Chest: measure around the fullest part, under the arms and across the shoulder blades, keeping the tape level.
- Waist: measure where you wear your trousers, not over a belt.
- Collar: measure around the base of the neck where the collar sits, with a finger’s room under the tape.
Compare those centimetres with the brand’s own chart, and read the fit notes; our page on what "true to size" means explains the common phrases.
A note for merchants
Shoppers search for conversions because a single size label does not tell them how a garment will fit. If you sell clothes online, publish a size chart in centimetres for each product, say whether it shows body or garment measurements, and add a short fit note. A free size chart template is a quick place to start. On Shopify, Rendered Fits recommends a size for each product from your own size chart, so shoppers do not need a converter; there is a Free plan.
Sources: That British Tweed Company men’s size guide, Moss suit size guide, sizechart.uk men’s clothing size chart, John Lewis international size charts, Charles Tyrwhitt formal shirt size guide (EU site), Next size guide. Figures are taken from the tables in our clothing size converter, compiled on 29 September 2026. A value appears only where at least two published guides support it, and a dash means there is no consistent published figure.
Other size conversions
- UK to US women’s clothing sizes
- US to UK women’s clothing and jeans sizes
- EU and French to UK women’s sizes
- German to UK clothing sizes
- Italian to UK clothing sizes
- UK and US shoe sizes, both ways
Every table in one place: the clothing size converter, or the size conversion guides index.
Frequently asked questions
What is a UK 40 suit in EU sizes?
A UK or US 40 suit or jacket is an EU 50, which suits a chest of about 102 cm.
What is a 32 waist in EU trouser sizes?
A 32 inch waist is an EU 48, about 81 cm.
What is a 15.5 collar in EU sizes?
A 15.5 inch collar is about 39.5 cm and an EU 39 shirt.
Are UK and US men’s sizes the same?
For suits, jackets, trousers and shirt collars, yes. Both use the measurement in inches. Men’s shoes differ: the US size is one above the UK size.
What is an EU 38 shirt in UK sizes?
An EU 38 shirt is a 15 inch collar.
About Rendered Fits. Rendered Fits is a Shopify app for fashion brands that recommends a size for supported products from the brand's own size chart, and can show shoppers an optional AI try-on preview. There is a Free plan, and Complete is $349 a month with a 14-day trial.
Related: clothing size converter · what "true to size" means · size chart template