Clothing Size Converter: Comparing US, UK, EU, and International Sizing
Clothing size numbers are not a universal scale. A US size, a UK size, and an EU size can all use the number 8, 10, or 38 to mean noticeably different body measurements.
Roughly speaking, US women's sizes run about 4 sizes smaller than UK numbers and about 30 smaller than EU numbers for the same body measurements (a US 8 is close to a UK 12 and an EU 38-40), but these offsets shift depending on the garment category and the brand's own size chart, so they're a starting point, not a guarantee.
Vanity Sizing
Within a single country's system, sizes have also drifted over time — a size labeled "10" today often corresponds to actual body measurements that would have been labeled larger decades ago. This is sometimes called vanity sizing, and it's part of why the same label doesn't reliably mean the same fit even within one country, let alone across borders.
Measurements Over Labels
The most reliable approach when shopping internationally, or from a brand you haven't worn before, is to compare your own body measurements (bust/chest, waist, hips) against the specific brand's published size chart rather than converting the size number directly. Size charts based on actual measurements don't suffer from the label drift that size numbers do.
Men's vs Women's Conversion
Men's sizing tends to be more measurement-based (a men's "32" waist is genuinely closer to 32 inches) and converts more predictably across countries than women's numbered sizing, which is more brand- and era-dependent.
Frequently Asked Questions
Why doesn't my usual size work when buying from a UK or EU retailer?
Clothing size numbers are not standardized internationally — a US 8, UK 8, and EU 38 refer to different body measurements, so the same number means a different fit depending on the country of origin. Converting the number is only a rough starting point.
What is vanity sizing?
Vanity sizing is the gradual relabeling of clothing sizes over time so the same number corresponds to larger actual body measurements than it used to. It's why a size "10" today often fits differently than a size "10" from twenty years ago, even within the same country.
Should I trust size charts or my measurements?
Your own body measurements compared against a brand's specific size chart are more reliable than converting a size number, since brand size charts are based on actual measurements while size labels drift over time and across countries.
Do men's and women's sizing scales convert the same way?
No — men's sizing is generally closer to a direct measurement (a men's 32 waist is close to 32 inches) and converts more predictably across countries, while women's numbered sizing varies more by brand and has shifted more over time.
This article is for informational purposes only. See our disclaimer.