Convert any size, instantly.
Clothes, shoes, rings and every everyday unit, between UK, US, EU and more. Free, fast and no sign-up.
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My Sizes
Frequently asked questions
Are the clothing and shoe size charts accurate for every brand?
They follow the standard conversion most retailers use, but cut and sizing vary by brand — that's why every converter here shows the full chart alongside your result, so you can sanity-check it rather than trust a single number blind.
Do I need to create an account to use My Sizes?
No. My Sizes saves to your own browser's storage on this device only — nothing is uploaded or tied to an account, which also means it won't follow you to a different device or browser.
Is this site free?
Yes, every converter and chart is free with no sign-up. The site is supported by display advertising.
Which unit conversions are exact vs. approximate?
Physical unit conversions (length, weight, volume, temperature, and so on) use exact international definitions, so those numbers are precise. Clothing, shoe and ring sizes are standardised guides rather than physical constants, so treat those as a strong starting point and check the retailer's own chart when it matters.
Can I convert in both directions?
Yes — every converter on the site works both ways as you type, so you can enter either side of the conversion.
I can't find the conversion I need — what do I do?
Try the search box at the top of the homepage first; it covers all 350+ pages on the site. If it's genuinely missing, let us know and we'll look at adding it.
Why ConvertAnySize?
Shopping from another country, following an American recipe, reading a French property listing or checking a child's size before a birthday: conversions come up every day. ConvertAnySize puts them all in one quick, clean place. Every converter works both ways as you type, every size chart shows the full table, and My Sizes remembers your own sizes on this device so they're ready next time you shop.
Unit conversions use exact international definitions. Clothing and shoe sizes follow the standard conversions most retailers use; brands do vary, so we always show the full chart and your measurements too.