Convert dress shirt collar sizes between US/UK inches, European centimetres and alpha sizes (XS to XXL) in seconds. Choose the size you know to see every equivalent.
Shirt sizes are approximate and vary by brand and fit — always check the retailer’s own size chart before ordering.
How to Use
- Tell the tool which size you know: collar inches, collar centimetres or an alpha size.
- Enter your collar measurement or pick your alpha size, for example M.
- Press Convert size to see the matching US/UK, EU and alpha sizes.
- Compare the result with the brand’s size chart before buying.
Key Features
- Three formats covered — converts between inch, centimetre and alpha collar sizes.
- Closest-match lookup — snaps in-between measurements to the nearest standard size.
- Instant results — conversions appear immediately with one click.
- 100% private — runs entirely in your browser; nothing is sent or stored.
FAQs
How do I measure my collar size?
Wrap a tape measure around the base of your neck where the collar sits, keeping one finger between the tape and your neck. Round to the nearest half inch or centimetre.
Why is the result labelled approximate?
Brands grade their patterns differently, so the same nominal collar can fit differently. Always check the retailer’s own size chart.
What if my measurement falls between two sizes?
The tool snaps to the nearest standard collar size. When in doubt, size up for comfort.
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: Dress Size Converter, Hat Size Converter and Glove Size Converter.