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US to UK men’s clothing and shoe sizes
US and UK men’s clothing sizes use the same numbers: a US 40 jacket is a UK 40 and a 16 collar is a 16. Shoes are the exception: take 1 off a US men’s shoe size for the UK size.
This covers tailored sizes in inches. Letter sizes (S, M, L) follow each brand’s own chest chart and can differ between US and UK brands.
By Sienna Stones · Published 12 November 2026
US to UK men’s size chart
| Item | US label | UK label | Example |
|---|---|---|---|
| Suit or jacket | Chest in inches | Same | US 40 = UK 40 |
| Formal shirt | Collar in inches | Same | US 16 = UK 16 |
| Trousers | Waist in inches | Same | US 32 = UK 32 |
| Shoes | US size | US minus 1 | US 10 = UK 9 |
Men’s US to UK shoe sizes
| US | UK | EU |
|---|---|---|
| 7.5 | 6.5 | 40–40.5 |
| 8 | 7 | 41 |
| 8.5 | 7.5 | 41.5–42 |
| 9 | 8 | 42–42.5 |
| 9.5 | 8.5 | 42.5–43 |
| 10 | 9 | 43–44 |
| 10.5 | 9.5 | 44–44.5 |
| 11 | 10 | 44–45 |
| 11.5 | 10.5 | 45.5 |
| 12 | 11 | 45–46 |
| 12.5 | 11.5 | 46–47 |
| 13 | 12 | 47–47.5 |
| 14 | 13 | 47.5–48.5 |
Common US men’s shoe sizes in UK sizes
- US 7.5 is a UK 6.5 and an EU 40–40.5.
- US 8 is a UK 7 and an EU 41.
- US 8.5 is a UK 7.5 and an EU 41.5–42.
- US 9 is a UK 8 and an EU 42–42.5.
- US 9.5 is a UK 8.5 and an EU 42.5–43.
- US 10 is a UK 9 and an EU 43–44.
- US 10.5 is a UK 9.5 and an EU 44–44.5.
- US 11 is a UK 10 and an EU 44–45.
- US 11.5 is a UK 10.5 and an EU 45.5.
- US 12 is a UK 11 and an EU 45–46.
- US 12.5 is a UK 11.5 and an EU 46–47.
- US 13 is a UK 12 and an EU 47–47.5.
- US 14 is a UK 13 and an EU 47.5–48.5.
Where the charts disagree
- Letter sizes: a US brand’s Medium can be cut larger than a UK brand’s Medium. Compare the chest measurement, not the letter.
- Shoes: Next and Nike both list the US men’s size as one above the UK size; EU sizes differ by up to a whole size between brands.
- Women’s sizes are different: see US to UK women’s sizes.
Why brands still vary
A conversion maps one label to another. It cannot know how a particular brand has cut and graded its sizes.
- Labels drift. Vanity sizing means the same number can describe a larger garment than it did years ago, and brands do not drift at the same pace.
- Body and garment measurements differ. A body chart says which body a size is meant for; a garment chart measures the finished item.
- Cut and fabric change the answer. A slim cut, a relaxed coat and a stretch fabric can carry the same label and leave very different room.
How to measure yourself
A conversion only shortlists a size. Your own measurements, checked against the brand's size chart, decide it.
- Chest: measure around the fullest part of your chest, under your arms, with the tape level.
- Collar: measure around the base of your neck where a shirt collar sits, with one finger under the tape.
- Waist: measure where you wear your trousers, not your natural waist, unless the brand says otherwise.
Then check whether the brand's chart shows body or garment measurements. Our explainer on what "true to size" means covers fit notes such as "slim fit".
A note for merchants
Shoppers search for conversions because a single size label does not tell them how an item will fit. If you sell clothes or shoes 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, Nike men’s footwear size chart (UK), Clarks shoe size chart (UK), Dr. Martens size guide (UK). 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 to EU men’s suits, trousers and shirts
- UK and US shoe sizes, both ways
- US to EU women’s sizes
- EU to US women’s sizes
- Australian to US women’s sizes
- EU to UK shoe sizes
- US to EU shoe sizes
- Men’s shirt collar sizes
- EU to UK men’s suit sizes
- EU to UK men’s trouser sizes
Every table in one place: the clothing size converter, or the size conversion guides index.
Frequently asked questions
Are US and UK men’s clothing sizes the same?
For suits, shirts and trousers sized in inches, yes. A US 40 jacket is a UK 40.
What is a US men’s 10 shoe in UK sizes?
A US men’s 10 is usually a UK 9 and an EU 43 to 44.
What is a US men’s 9 shoe in UK sizes?
A US men’s 9 is usually a UK 8.
What is a US men’s 11 shoe in UK sizes?
A US men’s 11 is usually a UK 10.
Is a US Medium the same as a UK Medium?
Not always. Letter sizes follow each brand’s chest chart, so compare measurements.
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