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Clothing and shoe size converter for AU, UK, US, CA and EU

Find your best clothing and shoe size match before you buy. SizeSwapper compares official brand size guides, AU, UK, US, CA and EU sizing, and your own measurements — the strongest fit guidance available, short of trying it on. Get a confidence rating and between-size advice, so you shop faster with less guesswork and fewer wrong-size returns.

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      Your closest match:

      This is the closest match based on available published measurements. Product-level fit may still vary.

      About SizeSwapper

      SizeSwapper exists because clothing and shoe sizing isn't standardised — a size 12 in one brand can be a size 8 or a size 16 in another, and most size charts make you do the comparison yourself, brand by brand, chart by chart.

      What we do differently

      Instead of showing you a static chart and leaving you to work out the conversion, SizeSwapper does the comparison for you: tell us a brand and size you already know fits, or just enter your measurements directly, and we'll show you the closest match in the brand you're shopping.

      We also rate how consistent each brand's sizing actually is, rather than presenting every conversion as an equally reliable fact. Some brands size very consistently across their range; others vary by product line. We tell you which is which.

      Coverage

      SizeSwapper currently covers 48 brands across clothing and shoes, with size systems for AU, CA, EU, UK, US. We're adding brands and categories over time — if you can't find a brand you're after, you can request it directly from the converter.

      How accurate is it?

      As accurate as the published data allows. We compare official measurement charts directly rather than guessing, but no brand-to-brand conversion can account for differences in cut, fabric, or fit on individual products. See our methodology page for the full explanation, and always check a specific product's own size guide before buying when fit really matters.

      Who's behind SizeSwapper

      SizeSwapper is an independently run size-conversion tool. We're not affiliated with any of the brands listed on the site beyond the affiliate relationships disclosed on our affiliate disclosure page.