What Is a Clothing Size Converter?

Shopping from international brands means confronting a tangle of size systems. A US women's 8 is a UK 12, an EU 40, and a Japanese 13 — four different numbers for the same garment. This converter translates your size between the US, UK, EU, and Japanese systems for both women's and men's clothing, so you can order with confidence from any store in the world.

How the Conversion Works

Select your clothing type (women's or men's), the size system you know, the system you are converting to, and enter your size. The calculator looks up your size in a standard industry conversion table and linearly interpolates when your size falls between two whole sizes — for example US 9 converts to UK 13, EU 41, and JP 14. The results panel shows every system side by side, with the target conversion highlighted in the primary result card.

Women's conversions use the standard dress-size scale, where the US size runs roughly 0–18 and EU sizes run about 32–50. Men's conversions use the suit and jacket chest scale, where US and UK sizes are identical (measured in inches) and the EU size is the US size plus 10.

Sizing Systems Explained

US sizes are the standard for American retailers. UK sizes run about four numbers higher for women (US 8 = UK 12). EU sizes run about 32 higher for women and are the dominant standard across Europe. JP sizes run five higher for women and match the US scale for men. Keep in mind that these are ready-to-wear standards — individual brands can shift a full size in either direction due to vanity sizing, so treat the result as a strong starting point and confirm with the retailer's chart.

Tips for International Shopping

When ordering from a new brand, check its specific size chart and, when possible, your bust, waist, and hip measurements rather than relying on the size label alone. If a conversion lands between two sizes, most shoppers prefer rounding up for tops and fitted items. For shoes and tailored clothing, measurements matter more than the converted number — use our measurement-based advanced converter for a fit driven by your actual body measurements.