Converting Clothing Sizes Across US, UK, EU, and AU
US, UK, EU, and AU clothing sizes each use their own numbering convention — a US women's size is commonly about 4 sizes smaller than the equivalent UK size, EU sizes use a different numbering range entirely (often based on body measurements in centimeters), and AU sizing commonly aligns closely with UK sizing — checking a specific conversion chart, rather than assuming a single universal offset, gives the most reliable result.
Clothing size conversion involves more moving parts than shoe size conversion, since clothing sizing conventions vary more between countries and between men's and women's categories.
US and UK sizing
For women's clothing, a US size is commonly about 4 sizes smaller than the equivalent UK size (a US size 8 is roughly a UK size 12) — a substantial, easy-to-miss offset if not accounted for when shopping across the two size systems.
EU sizing
EU clothing sizes typically use a different numbering range based more directly on body measurements — a US size 8 corresponds to roughly an EU size 38-40 for women's clothing, a conversion that isn't a simple offset from either the US or UK number.
AU sizing
Australian sizing commonly aligns closely with UK sizing for many clothing categories, though not always identically — checking a specific conversion chart rather than assuming AU and UK sizes are always perfectly interchangeable avoids a potential small mismatch.