Use the tool
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Approximate size equivalents
What this tool does
Use this women’s size converter to compare common US, UK, EU and Australian clothing sizes, estimate alpha sizes such as XS–2XL, convert a waist measurement to an approximate apparel size, or compare common women’s shoe sizes. Because sizing varies by brand and garment cut, every result is an approximate starting point rather than a guarantee of fit.
International clothing labels are not perfectly standardized. A nominal US 8, UK 12 or EU 40 can fit differently across retailers, fabrics and product categories. This converter uses common cross-market equivalents to make shopping easier, but the product-specific size chart and garment measurements should always take priority when available.
Useful for
- Compare women’s dress, top, skirt and general apparel sizes across US, UK, EU and AU systems.
- Translate numeric sizes into approximate alpha sizes such as XS, S, M, L and XL.
- Use a waist measurement in inches as a quick jeans or bottoms sizing estimate.
- Compare common women’s shoe sizes across US, UK and EU systems.
How to use it
- Choose the conversion type: general clothing, waist/jeans estimate or shoes.
- Select the source sizing system and your current size or measurement.
- Run the conversion to see approximate equivalents in the other systems.
- Before buying, compare the result with the retailer’s product-specific size chart and customer fit notes.
Worked examples
US to international clothing
InputUS women’s size 8
ResultApprox. UK 12, EU 40 and AU 12; usually around a Medium.
The exact fit can shift by brand, fabric stretch and garment cut.
Waist estimate
Input29-inch waist
ResultA starting estimate around US 8 / UK 12 / EU 40 / AU 12.
Jeans sizing is especially brand-specific, so compare the listed garment waist measurement when available.
Common mistakes to avoid
- Assuming the same labeled size fits identically across every retailer.
- Using a general clothing conversion for bras, petite, tall, maternity or highly tailored garments.
- Ignoring fabric stretch, rise, cut and intended fit when choosing jeans or trousers.
- Treating shoe conversions as exact even though shoe lasts and width standards vary by brand.
Before you use the result
- Check the retailer’s own chart when it lists bust, waist, hip, foot length or garment measurements.
- Read whether the product is described as slim, relaxed, oversized, petite, tall or stretch.
- When between two sizes, consider fabric stretch and the fit you prefer rather than relying on the converted number alone.
- For shoes, check foot-length guidance and width information where provided.
Edge cases and limitations
- Designer, Asian-market, petite, plus-size and specialty sizing may not follow the same conversion pattern.
- Vanity sizing can make two garments with the same label fit very differently.
- Alpha sizes such as S or M often cover more than one numeric size.
- Shoe half-sizes and EU conversions are approximate because brands use different lasts and rounding conventions.
Practical tips
- Use your best-fitting garment as a measurement reference when shopping online.
- For non-stretch trousers and dresses, waist and hip measurements are usually more useful than the label alone.
- For stretchy knitwear, the intended fit may matter more than a one-size difference.
- Save the size that works for each retailer because brand-specific fit tends to be more consistent than global size labels.
Frequently asked questions
Are international women’s sizes standardized?
No. Conversion tables are useful approximations, but retailers can use different body measurements, cuts and grading rules.
What is a US women’s size 8 in the UK and EU?
A common approximation is UK 12 and EU 40, usually around a Medium. Always check the retailer’s chart before ordering.
Can I convert jeans by waist measurement?
Yes, but only approximately. Jeans rise, stretch, cut and vanity sizing can change the best fit even at the same waist measurement.
Does this work for bras?
No. Bra sizing uses band and cup systems that need a dedicated bra-size conversion method.
Are shoe conversions exact?
No. They are approximate because brands use different lasts, widths and rounding between systems. Foot length is often the best cross-brand reference.