Clothing Size Converter (US/UK/EU/Asia)
Convert a clothing size between US, UK, EU, and Asian charts for women's and men's apparel.
Reviewed by the ToolNestr Editorial Team — July 2026
How clothing size conversion works
This converter translates a clothing size between the four sizing systems shoppers run into most often: US, UK, EU, and a general Asia market equivalent. Women's tops and dresses use a numeric scale in every system, but the numbers themselves are offset — a US size 8 is roughly a UK 12 and an EU 40, even though it is the same garment. Men's tops instead use letter sizes (S, M, L) tied to a chest measurement range, so this tool switches to a chest-based table when you select Men's.
The women's numeric relationship follows the general pattern used across most international retailers: UK size is roughly the US size plus 4, EU is roughly the US size plus 32, and general Asia-market numeric sizing runs its own separate scale that is smaller in number than EU but does not track US or UK by a fixed offset. Men's sizing converts through a chest-circumference lookup table rather than a fixed offset, since letter sizes map to a range rather than a single number.
Sizing relationships follow the general international apparel-industry conversion standard also referenced in ASTM D5585 (US Misses sizing) and ISO 3635 (international garment size designation); individual brands publish their own charts that can vary from this general standard.
Worked example
A shopper wears a US women's size 8 and wants to order a dress from a UK retailer.
Real-world context
International online shopping is the most common reason people reach for a size converter — a US shopper ordering from a UK-based retailer, or a UK shopper buying from a European brand's own site, needs to know that the number on the page does not mean what it would at home. A US women's 8 buyer who orders a European size 8 without converting would end up with a garment several sizes too small, since that EU 8 is closer to a US size -24 on the numeric relationship — effectively impossible, which is exactly why so many first-time cross-border orders come back as returns.
Travelers and expats run into the same gap in person. Someone who has always bought a UK 14 moving to the US will find that number simply does not exist on most American racks, where the equivalent is a US 10 — knowing the conversion in advance saves an awkward changing-room guessing game.
Resale and secondhand shopping across borders (eBay, Vinted, Depop international listings) is a fast-growing use case, since sellers often list the size as originally labeled without noting the country, leaving buyers to convert it themselves before bidding.
Common misconceptions
"A US 8 is always exactly a UK 12 everywhere." Not quite. That is the general industry relationship, but individual brands shift it by a size or more — a UK fast-fashion brand may run its 12 closer to a US 6, while a UK heritage tailoring brand may run closer to a US 10. Always check brand-specific charts for a precise fit.
"Asia sizing is just one universal scale." It isn't. Japanese, Korean, and Chinese domestic sizing each use their own logic and tend to run smaller than the general international "Asia" size shown on global retail sites, which is itself an approximation aimed at international shoppers rather than a domestic standard.
Related tools
Frequently asked questions
Are these conversions exact across every brand?
No. This chart reflects the general industry-standard relationship between sizing systems. Individual brands run their own size charts that can differ by a size or more, especially fast-fashion and luxury labels, so always check the brand's own chart when possible.
Why does EU sizing use such different numbers than US?
EU sizing traditionally derives from body measurements in centimeters rather than a separate arbitrary scale, so EU numbers run roughly 32 higher than the equivalent US women's number and about 8-10 higher than the men's chest-based letter sizes converted to numbers.
What does "Asia" sizing mean here?
Many Asian retailers (particularly Japan, South Korea, and China) publish their own size charts. This converter uses the common general-market Asian numeric equivalent seen on international retail sites; Japanese domestic brands in particular often run smaller than this general chart.
Should I size up when ordering from a different country?
If you are between two converted sizes, sizing up is usually the safer choice for wovens and structured garments, while stretch/knit fabrics have more forgiveness either way.
Is men's sizing converted the same way as women's?
No — men's tops are usually sized by letter (S/M/L/XL) tied to a chest measurement range, not a numeric scale, so this tool uses a separate men's chest-based table rather than the women's numeric offset.