Free Women's Clothing Size Converter
Convert women's clothing sizes across US/CA, UK, EU, IT, FR, AU, and JP systems. Full size table with bust measurements. Free, no sign-up.
Exact Conversion Formula & Multipliers
Women's clothing sizing varies even more by country than men's: a US size 8 corresponds to roughly a UK size 12, an EU size 38–40, and an Italian size 42–44 — offsets that are approximate rather than exact because they're based on historical body-measurement charts, not a mathematical formula. Vanity sizing (where the same physical garment is labeled with progressively smaller numbers over the decades) further means these mappings shift over time and differ noticeably between brands.
Practical Real-World Scenarios
- International online shopping: converting a known US or UK size to European or Asian sizing is essential before ordering, since return shipping for ill-fitting imported clothing is often costly.
- Vintage and secondhand shopping: older garments may be labeled according to sizing conventions that no longer match a current size chart in the same country, requiring measurement-based conversion instead.
- Cross-brand shopping: because sizing isn't standardized even within one country, shoppers often need a size 'up' or 'down' when switching brands, using body measurements as the more reliable reference.
Historical & Technical Background
Standardized women's clothing sizing in the US began in the 1940s and 50s based on government-sponsored body-measurement surveys, but retailers gradually drifted from those original standards over subsequent decades in a widely documented trend called vanity sizing, where labeled sizes shrank relative to actual garment measurements to flatter customers. Because no single global authority enforces clothing size standards, national systems evolved independently, and even the same numbered size varies meaningfully between two brands in the same country today.
Precision & Accuracy Statement
Every conversion factor used on this page is checked against internationally recognized reference standards — ISO 3635 and ISO 3636 international garment-sizing standards — rather than approximated or rounded for display. Where a constant is fixed by international definition (such as 1 inch = 2.54 cm, or standard gravity = 9.80665 m/s²), we use the exact defined value. Where a figure is a practical industry convention rather than a physical constant, that distinction is stated explicitly above so results are never presented with false precision.
How This Converter Works
Women's clothing sizes vary significantly across regions — US 6 is UK 10 is EU 38 is JP 9. Our full lookup table covers all major sizing regions with bust measurements as the universal reference point.
Common Conversions
| Int'l | US/CA | UK | EU | IT | FR | Bust (in) | Bust (cm) |
|---|---|---|---|---|---|---|---|
| XXS | 0 | 4 | 32 | 36 | 32 | 30–31 | 76–79 |
| XS | 2 | 6 | 34 | 38 | 34 | 32–33 | 81–84 |
| S | 4 | 8 | 36 | 40 | 36 | 34–35 | 86–89 |
| M | 6 | 10 | 38 | 42 | 38 | 36–37 | 91–94 |
| L | 8 | 12 | 40 | 44 | 40 | 38–39 | 97–99 |
| XL | 10 | 14 | 42 | 46 | 42 | 40–41 | 102–104 |
| XXL | 12 | 16 | 44 | 48 | 44 | 42–43 | 107–109 |