Buy a dress in Paris, order one from Seoul, or bring home a bargain from a Roman market stall, and you’ll run into the same problem: the number on the tag means something completely different depending on where it was sewn.
A French 42 is not an Italian 42. A Korean 66 is not a US 6. Even “Medium” doesn’t mean the same thing in Tokyo as it does in Texas.
Below is a free, updated size converter covering nine sizing systems, plus the body-measurement data, history, and country-by-country quirks behind those numbers — so you’re not just guessing when you shop.
Table of Contents
The article was last updated on 07/07/2026.
Why the same size fits so differently in every country
There is genuinely no single global clothing-size standard. The International Organization for Standardization published a family of standards for size labeling starting in the late 1970s — ISO 3635 for definitions and body-measurement procedure, followed by ISO 3636–3638 for men’s, women’s and infants’ outerwear. Most of those early standards have since been withdrawn and folded into the newer ISO 8559 series, which closely tracks Europe’s own EN 13402 standard.
Here’s the catch: adopting a standard is voluntary. The United States has never had a mandatory clothing-size law. A federal guideline existed briefly — the National Bureau of Standards published Body Measurements for the Sizing of Women’s Patterns and Apparel in 1958 — but it was downgraded to a voluntary commercial standard and formally scrapped by the Department of Commerce in 1983, according to Wikipedia’s account of U.S. clothing-size history. Since then, every American brand has been free to size garments however it wants, which is a big part of why a size 8 at one store and a size 8 at another can differ by several inches.
Europe took a more coordinated path. Under EN 13402, France, Belgium, Spain and Portugal generally share one national numbering (32, 34, 36…), while Germany’s sizing is also used by Austria, the Netherlands and Scandinavian retailers — a grouping confirmed by Wikipedia’s clothing-sizes overview. Italy runs its own, separate numbering that sits about four sizes ahead of the French/Belgian scale. None of these fully align with the UK’s own imperial-derived system, which is why a single “EU size” label on an item can still hide three different cuts.
Another advantage is finding traditional dresses or clothes you can not find in your country.
Quick global size conversion chart
Use the table below as a fast reference for women’s dress and suit sizes. Because Korean and Japanese numeric sizing don’t extend as far, some cells for larger US sizes are marked “—”; see the country notes further down for what to do instead.
| US | UK / Australia | Europe (Germany/Benelux/Scandi) | France / Belgium / Spain | Italy | International | Japan | Korea |
|---|---|---|---|---|---|---|---|
| 0 | 4 | 30 | 32 | 36 | XXS/XS | 5 (S) | 33 |
| 2 | 6 | 32 | 34 | 38 | XS | 5–7 (S) | 44 |
| 4 | 8 | 34 | 36 | 40 | S | 7 (S/M) | 55 |
| 6 | 10 | 36 | 38 | 42 | S/M | 9 (M) | 66 |
| 8 | 12 | 38 | 40 | 44 | M | 9 (M) | 77 |
| 10 | 14 | 40 | 42 | 46 | M/L | 11 (L) | 88 |
| 12 | 16 | 42 | 44 | 48 | L | 11 (L) | 99 |
| 14 | 18 | 44 | 46 | 50 | L | 13 (XL) | — |
| 16 | 20 | 46 | 48 | 52 | XL | 13–15 (XL/XXL) | — |
| 18 | 22 | 48 | 50 | 54 | XL | 15 (XXL) | — |
| 20 | 24 | 50 | 52 | 56 | XXL | — | — |
| 22 | 26 | 52 | 54 | 58 | XXL | — | — |
| 24 | 28 | 54 | 56 | 60 | 3XL | — | — |
Prefer to enter your own size or measurements and get every equivalent at once? Use the interactive converter below.
Our free dress size converter
This size converter will convert your country-size dress or suit to the following: US, UK, Germany, France, Italy, and Korea.
Global Dress Size Converter
Select your region and size to instantly find equivalents worldwide.
How to measure yourself
Wrap the tape around the fullest part of your bust, keeping it level and snug but not tight.
Measure around your natural waistline — the narrowest point, usually just above the belly button.
Stand with feet together and measure around the fullest part of your hips and seat.
How to measure yourself (so the chart above actually works)
Every size chart, no matter the country, is only as good as the measurements behind it. Take these three the same way every time:
- Bust: Wrap the tape around the fullest part of your bust, keeping it level across your back. Don’t pull it tight.
- Waist: Measure your natural waistline — the narrowest point, usually just above the belly button, not where your jeans happen to sit.
- Hip: Stand with your feet together and measure around the fullest part of your hips and seat.
Retailers including ASOS publish their own dress size charts with these same three measurements, and they’re worth cross-checking against a brand’s own numbers before you buy — especially for fitted or structured styles.
Approximate US size ↔ body measurement chart (inches)
| US Size | Bust | Waist | Hip |
|---|---|---|---|
| 0 | 32 | 24 | 34.5 |
| 2 | 33 | 25 | 35.5 |
| 4 | 34.25 | 26.25 | 36.75 |
| 6 | 35.25 | 27.25 | 37.75 |
| 8 | 36 | 28 | 38.5 |
| 10 | 37.25 | 29.25 | 39.75 |
| 12 | 38.5 | 30.5 | 41 |
| 14 | 40 | 32 | 42.5 |
| 16 | 41.5 | 33.5 | 44 |
| 18 | 43.5 | 35.5 | 46.5 |
| 20 | 45.5 | 37.5 | 49 |
| 22 | 47.5 | 39.5 | 51.5 |
| 24 | 49.5 | 41.5 | 54 |
These figures are a general guideline compiled from published women’s size charts; individual brands can and do vary by an inch or more in either direction.
The strange history behind why “size 8” keeps changing
If you’ve ever wondered why your grandmother’s “size 12” would barely fit a modern size 6, the explanation is a genuine, well-documented phenomenon called vanity sizing — labeling a garment with a smaller number than its actual measurements would traditionally warrant.
A few data points make the shift concrete:
- In 1939, the U.S. Department of Agriculture measured roughly 15,000 women to build the country’s first statistical sizing system — but the sample skewed toward one income group and assumed an hourglass figure that, even then, described a small minority of women, as TIME’s history of women’s clothing sizes explains.
- That data fed into a 1958 government-backed standard sizing women’s clothing from 8 to 38, with height codes for tall, regular and short.
- The Department of Commerce withdrew that standard entirely in 1983, leaving manufacturers free to size however they liked — the moment most historians point to as the start of modern vanity sizing.
- The scale of the drift is large: garment researchers cited by Fit Analytics’ history of vanity sizing found that between 1958 and 2008, a U.S. size 8 grew by as much as six inches across key measurements without the label ever changing.
- Wikipedia’s entry on vanity sizing notes that a dress with a 32-inch bust was labeled a size 14 in Sears’ 1937 catalog, a size 8 by 1967, and a size 0 by 2011 — the same measurements, three completely different numbers.
None of this makes today’s sizes “wrong” — it just means a size label is a marketing decision as much as a measurement, and it’s one more reason a size converter is a guide, not a guarantee.
Country-by-country quirks worth knowing
South Korea. Korean women’s sizing traditionally uses a numeric system — 44, 55, 66, 77, 88 — that looks bewildering at first but has a simple origin: the two digits historically referenced a base body measurement (a 155 cm height paired with an 85 cm chest gave the size “55”), a system explained in more detail by HaniSeoul’s Korean size guide.
Size 55 is the most commonly stocked and is treated as the local average; relatively few domestic brands size above 88, so shoppers above roughly a US size 12–14 often need to look at international or plus-size-specific Korean retailers. “Free Size” garments, common for tops and dresses, are cut to fit around a Korean 44–55 frame — closer to a US 0–6 — rather than being genuinely one-size-fits-all.
Japan. Japanese women’s sizing typically runs on odd numbers — 7, 9, 11, 13 — alongside S/M/L/LL labels, and it runs noticeably smaller than Western sizing because it’s built around a smaller average frame. Kiwi Sizing’s Japan-to-US conversion guide notes that Japanese sizes are, roughly, five numbers ahead of the equivalent US size — a US 4 lands close to a Japanese 9. Cuts also tend to be slimmer through the shoulder and shorter in the body and sleeve than the size number alone suggests, so sizing up from the conversion chart is common advice for visitors.
Europe. “EU size” isn’t really one system — it’s shorthand for whichever national scale a given retailer follows. French, Belgian, Spanish and Portuguese retailers typically share the same numbering; German sizing is shared with Austria, the Netherlands and Scandinavia; and Italy uses its own scale that runs about four numbers ahead of the French one for the same body measurements, per Wikipedia’s clothing-size comparison. A “40” in a Milan boutique and a “40” in a Paris one are not the same dress.
Australia. Australian women’s sizing has historically tracked the UK’s numbering fairly closely, though individual Australian brands have drifted with their own vanity sizing over time, so treat the UK-equivalent column as a starting point rather than gospel.
Buying clothes abroad: a few practical notes
- Markets and independent boutiques rarely have fitting rooms. If you can’t try something on, converting your usual size is only a starting point — ask for the garment’s flat measurements if at all possible.
- Letter sizes (S/M/L) are the least reliable cross-border reference, since the body measurements behind “Medium” shift by country and even by brand within the same country.
- When in doubt, size up rather than down for countries whose average frame runs smaller than yours (Japan and Korea being the most common examples for Western shoppers), and always check the retailer’s return policy before you buy internationally.
- For structured or fitted pieces, prioritize the bust measurement for tops and dresses and the waist measurement for skirts and trousers — it’s harder to alter shoulder width or a nipped waist than a hem.
For the US dress size, check here.
Check out different dress size charts for women here.
If you want to know how to choose the right handbag according to your body shape, click here.
Frequently Asked Questions
How does the dress size converter work?
It cross-references women’s dress and suit sizes across nine sizing systems — US, UK, Europe, France, Italy, Australia, Japan, Korea and the international XS–XXL scale — using publicly available size-chart data. Select your country and size (or enter your bust, waist and hip measurements), and it returns the closest equivalent in every other system.
Is the dress size converter accurate?
It’s accurate as a general guideline based on standard published size charts, but no converter can account for every brand’s individual cut. Two dresses labeled the same size, from two different labels, can differ by an inch or more in any given measurement — this is well documented as an ordinary feature of the industry, not a flaw in any one size chart.
Can I trust the size conversions for all types of clothing?
Use it as a strong starting point for dresses, tops and suits. Trousers, jeans and outerwear often follow separate size logic (waist inseam sizing, for instance), so check a garment-specific chart when one is available.
What if my size falls in between two options?
Go with the larger of the two, especially for structured or non-stretch fabric — a slightly loose garment is easier to take in or belt than a tight one is to let out.
Can I use the dress size converter for men’s or children’s clothing?
Not yet — this tool is built specifically around women’s dress and suit sizing. Men’s and children’s sizing follow different measurement logic entirely and deserve their own dedicated charts.
What if the converted size doesn’t fit me?
That’s normal, especially when shopping a country whose average body proportions differ from your own. Standard return and exchange policies apply to most online retailers — check the seller’s policy before you order, and note that international returns can be slow or costly, so it’s worth double-checking measurements first when that’s an option.
Why do Korean and Japanese sizes stop at a certain point on the chart?
Domestic numeric sizing in both countries is built around a smaller average frame and, historically, hasn’t extended as far up the scale as US, UK or European sizing. Above roughly a US 12–14, it’s usually more reliable to shop international brands sold locally, or a retailer’s specific plus-size range, than to look for an equivalent in the traditional numeric system.
Pashalis Laoutaris
I am a professional writer, fashion blogger, and owner of the site https://laoutaris.com. As a salesperson for more than 20 years, I have experience of 10 years in the fashion industry. I consider myself a true fashionista. I am writing daily blog articles about fashion, tools and converters, and everything you need to know about the current fashion trends.
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