UK to US Hat Size Conversion
| UK | US |
|---|---|
| 6 3/4 | 6 3/4 |
| 6 7/8 | 6 7/8 |
| 7 | 7 |
| 7 1/8 | 7 1/8 |
| 7 1/4 | 7 1/4 |
| 7 3/8 | 7 3/8 |
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.
A UK 7 hat is a US 7 hat — no arithmetic required, since both countries measure head circumference on the identical fractional-inch scale, which makes this page mostly a confirmation for a UK buyer checking an unfamiliar US retailer's listing.
More useful than the size number itself is your actual head circumference in inches or centimetres, since fitted-hat brands vary slightly in how generously they cut the same labelled size — worth having that raw measurement on hand rather than trusting the number alone for a first order.
Frequently asked questions
Should I adjust anything ordering from a US hatter as a UK buyer?
Not the size number — it is the same scale. Having your actual head circumference measured is still worth doing, since fitted-hat brands cut the same labelled size slightly differently from each other.