UK to US Men's Shirt Size Conversion
| US/UK Neck (in) | US/UK Neck (in) |
|---|---|
| 14 | 14 |
| 14.5 | 14.5 |
| 15 | 15 |
| 15.5 | 15.5 |
| 16 | 16 |
| 16.5 | 16.5 |
| 17 | 17 |
| 17.5 | 17.5 |
| 18 | 18 |
Sizing conventions vary by brand and by cut — this table shows the standard published conversion. Always check the garment's own size chart when one is available. See how these tables are compiled.
UK and US dress shirts share the identical inch-based neck scale, so a British 16in collar and an American 16in collar describe the same measurement with zero conversion required — the genuine translation step on this site's shirt chart only shows up once EU centimetres enter the picture.
Where a UK buyer ordering from a US retailer actually needs to pay attention is sleeve length: American tags virtually always print an explicit sleeve figure alongside the neck (16/34), a two-number format that many British brands don't bother with, instead labelling fit as slim, regular, or long — if you don't already know your sleeve length in inches, it's worth measuring before your first US order rather than guessing from a fit label alone.
Frequently asked questions
Is there a size difference at all buying from a US shirt brand as a UK customer?
Not in the neck measurement — both countries use the same inch scale. The difference worth checking is that US brands print an explicit sleeve number, which UK brands sometimes replace with a fit label instead.
How do I find my sleeve length if a UK shirt never printed one?
Measure from the centre back of your neck, across the shoulder, to your wrist with the elbow slightly bent — that figure is what a US retailer’s two-number sizing (neck/sleeve) is asking for.