Why this converter exists
You spot a dress on ASOS labelled "UK 10". A Spanish store calls it "EU 38". A Japanese listing says "11". An AliExpress seller writes "165/88A". Those are the same body measurements, every country just counts them differently.
Type one size (whichever you happen to know, EU, US, UK or generic S-XXL), the converter shows every other system side by side. Plus two sizes down and two sizes up, in case a particular brand cuts narrow or generous.
A separate tab for jeans, because their labels work differently: the 28 on a pair of Levi's means 28 inches around the waist, not a European 28. Below the result, brand-specific notes for the names that trip people up most often: Zara and Mango run small, Shein can be two sizes off, ASOS is usually true to size.
How to use it
- Pick the category at the top: Top, Dress or Pants and jeans. Tops and dresses share a single chart (S-XXL with EU/US/UK numbers), jeans use a separate one keyed off waist measurement in inches.
- Pick what you know: EU size (shopping in mainland Europe), US (Amazon, Macy's, Nordstrom), UK (ASOS, Marks & Spencer, John Lewis) or the universal S-XXL letter if all you have is a generic label.
- Type your size in the field next to it. The dropdown only shows values that actually exist in that system, you cannot mistype.
- The Your sizes section shows every equivalent at once: EU, US, UK, JP, CN, IT, FR, AU plus the generic S-XXL. One glance and you know what number to click in any given store.
- The Neighbouring sizes section shows two sizes down and two sizes up. Useful when a brand is known for an unusual cut, or when you are between sizes and not sure which way to go.
- Below the chart, expand Brand-specific notes to see which brands cut small (Zara, Mango, Shein), and which run true to size (H&M, ASOS basic).
- The How to measure yourself section gives you four short steps: bust, waist, hips. A soft tape measure costs about $3, worth keeping in a drawer.
When this is useful
Six typical situations where the converter saves you a return or a surprise:
- Ordering from ASOS, Shein or AliExpress. You see a chart with UK or CN sizing and have no idea whether that is your size. You type what you do know (EU 38), the converter tells you it is UK 10 and CN 165/88A, you click "Add to cart" with confidence.
- Buying a gift for someone abroad. Your sister lives in Germany, your cousin in the US, your friend in the UK. Each gives a size in their own system. The converter puts them side by side so you know exactly what to click in your local store.
- Shopping on a trip overseas. You are at an outlet mall in the US or on Oxford Street in London. You know you wear EU 40 at home, but the tags here say US and UK. A quick lookup on your phone saves 20 minutes of fitting-room ping-pong.
- Buying vintage or second-hand on Vinted or eBay. Someone is selling a dress tagged "IT 44" or "FR 40". The converter tells you that is EU 44, which is XXL. You buy with eyes open, or skip, no expensive return.
- Picking jeans online. You type your waist (say 28 inches), the converter shows that is W28 in the US system, EU 38 and W28 at Levi's. No mental math, no juggling three calculator tabs.
- A Japanese or Korean store. You fall in love with a Japanese dress labelled "11". You have no clue whether that is for a child or an adult. The converter says JP 11 = EU 38 = M, standard adult medium. You order with confidence.