Convert suit jacket sizes between US, UK and European sizing systems in seconds. Enter your size in one system to see the equivalents in the others — ideal when shopping suits from international brands.
Suit sizes are approximate and vary by brand, country and cut — always check the retailer’s own size chart before ordering.
How to Use
- Choose the sizing system of the size you know: US, UK or EU.
- Enter your suit jacket size, for example 40.
- Press Convert size to see the matching US, UK and EU sizes.
- Use the approximate chest measurement to double-check against a size chart.
Key Features
- Three systems covered — converts between US, UK and European suit sizes.
- Chest estimate included — shows the approximate chest measurement in inches and centimetres.
- Instant results — conversions appear immediately with one click.
- 100% private — runs entirely in your browser; nothing is sent or stored.
FAQs
Are US and UK suit sizes the same?
Yes. For suit jackets the US and UK numbers are identical — both measure the chest in inches. The EU size is normally 10 higher, so a US 40 is an EU 50.
Why is the result labelled approximate?
Brands cut differently, and slim, regular and relaxed fits measure differently even at the same nominal size. Treat the conversion as a starting point and check the retailer’s chart.
Does this cover trousers as well?
This tool converts jacket sizes only. For trousers, try the Trouser Size Converter.
Is my data sent anywhere?
No. Everything runs entirely in your browser and never transmits or saves your entries.
Related Tools
Try these related tools: Shoe Size Converter, Dress Size Converter and Hat Size Converter.