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Women's Clothing Size Converter

Converts women's clothing sizes between US, UK, EU, France, Italy and Japan, and works the EU size out from a bust measurement in centimetres.

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In short One of these columns means something and the rest are labels, so convert to the one that means something. The EU (German) size is defined on your body: EU = bust in cm ÷ 2 − 6, so an 88 cm bust is a 38, a 92 cm bust is a 40, and each size up is exactly 4 cm more bust. That rule reproduces every row of every published European chart, which is the tell that the chart is just this division written out. The US, UK, French and Italian numbers are not measurements at all — they are positions on a ladder, related to each other by fixed offsets that everyone prints and no standards body defines: UK is US + 4, France is US + 32, Italy is US + 36, Japan is US + 3. So a US 8 is a UK 12, a French 40, an Italian 44 and a Japanese 11. The reason those offsets still leave you buying the wrong thing is that the US end of the ladder has drifted: American sizes have been relabelled downwards for decades, so a garment sold as a 6 by one brand and a 10 by another can fit the same person. The practical method is therefore to measure your bust, get the EU number from the formula, use the offsets to find the nominal size elsewhere, and then check that specific brand's own centimetre chart before ordering — because the brand chart is evidence and the size label is marketing.

How to use the Women's Clothing Size Converter

  1. Pick which size system you already know — or choose the bust option and enter centimetres.
  2. Enter the number.
  3. Read the equivalent in every other system, with the bust measurement each one implies.

About the Women's Clothing Size Converter

A size converter for women's clothing that shows where each number comes from, rather than reprinting a table. The European column is derived from your bust measurement; the others are the conventional offsets.

What people use it for

  • Ordering from a European, Italian or Japanese shop that lists only its own sizes.
  • Working out a size from a bust measurement when no size label is available.
  • Buying a gift when you only know what someone wears at home.

Details

The EU ruleEU size = bust in cm ÷ 2 − 6. An 88 cm bust is a 38
Step size4 cm of bust per size, in every European country
UKUS + 4 — a US 8 is a UK 12
FranceUS + 32; Italy is US + 36; Japan is US + 3
AustraliaFollows the UK ladder exactly
What is not standardisedThe US number. It is a label, and it has drifted downwards for decades
PrivacyThe arithmetic runs in your browser. Nothing you type is sent anywhere

The maths behind it

This tool uses EU = bust in cm ÷ 2 − 6, which is the German rule and the only one of these that is a measurement. The rest are fixed offsets off the US number: UK = US + 4, EU = US + 30, FR = US + 32, IT = US + 36, JP = US + 3. Every intermediate value is shown on screen, so the result can be checked by hand.

Only the European column is a measurement. Everything else on this page is a convention, and the tool marks the difference because the two deserve different amounts of trust.

Where this tool stops

It converts nominal sizes and the bust measurement behind them. It cannot account for cut, fabric stretch, or a brand that runs a size small on purpose, and it does not attempt petite, tall or plus-size ladders, which are separate systems in most countries rather than extensions of this one.

Frequently asked questions

Is a US 8 really a UK 12?
On paper, yes — the offset of four is what every published chart uses, and it is consistent from US 0 to US 24. In a shop it depends on the brand, because the US number is not tied to a measurement. Treat US 8 = UK 12 as the starting point and the brand’s own centimetre chart as the answer.
Why is the European number so much larger?
Because it is a different thing. It is half your bust in centimetres minus six, so it scales with your body rather than counting positions on a ladder. That is also why it is the number to trust: a German 38 is 88 cm of bust in Berlin, in Milan and in Tokyo.
Which measurement decides the size — bust, waist or hip?
The bust decides the label, in every European system. Waist and hip decide whether it actually fits, which is a different question and the reason two garments in the same size can suit two different people. If your waist and hip sit far from the bust-based size, look for a brand that publishes all three.
What is vanity sizing and does it affect this?
It is the long slide of American size labels downwards, so that a garment that was a 12 in the 1960s is a 6 now. It affects the US column and nothing else here — the European formula is anchored to centimetres, so it cannot drift.
Do Italian and French sizes follow the same rule?
They follow the same ladder with different starting numbers: France is the German number plus two, Italy is the German number plus six. So a German 38 is a French 40 and an Italian 44, which is the offset the tool applies.
Are there any usage caps on the Women's Clothing Size Converter?
No charge and no sign-up. There is no free tier to run out of because there is no paid tier — inputtesthub.com is funded by advertising rather than by metering the page.
Does anything I enter leave my computer?
No. The Women's Clothing Size Converter runs entirely in your browser using JavaScript. Nothing is transmitted, logged or stored, which you can verify yourself in the Network tab of your browser's developer tools.
Can I check the maths myself?
It uses EU = bust in cm ÷ 2 − 6, which is the German rule and the only one of these that is a measurement. The rest are fixed offsets off the US number: UK = US + 4, EU = US + 30, FR = US + 32, IT = US + 36, JP = US + 3. The full working is printed under the result, so you can follow every step rather than trusting a black box.
Who is the Women's Clothing Size Converter for?
In practice it gets used for three things: ordering from a European, Italian or Japanese shop that lists only its own sizes. Working out a size from a bust measurement when no size label is available. Buying a gift when you only know what someone wears at home. It is built for exactly those cases rather than being a general-purpose tool with this bolted on.
Is there anything the Women's Clothing Size Converter cannot do?
It converts nominal sizes and the bust measurement behind them. It cannot account for cut, fabric stretch, or a brand that runs a size small on purpose, and it does not attempt petite, tall or plus-size ladders, which are separate systems in most countries rather than extensions of this one. Knowing where a tool stops being trustworthy matters more than the cases where it works.
What figures does the Women's Clothing Size Converter work from?
The EU rule is EU size = bust in cm ÷ 2 − 6. An 88 cm bust is a 38. Step size is 4 cm of bust per size, in every European country. UK is US + 4 — a US 8 is a UK 12. These are printed on the page itself, so you do not have to take them on trust.
How precise is the result?
The calculation runs in double precision and the result is shown to ten significant figures, so converting a value and converting it back returns the original. What is displayed is rounded for readability; what is copied is not.

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