US to Japanese women's dress size converter
Shows the Japanese size that matches a US women's dress, top or blouse size, using the common retail conversion chart. Japanese brands often cut narrower in the shoulders and sleeves.
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Processing and privacy: The result is calculated inside your browser and your data is not sent to any server.
How to use it
- Enter us size (us).
- The result appears straight away and updates as you edit.
- Copy the result, or copy a link that keeps the same values to share it.
How it is calculated
JP size = US size + 5. Chart used: UK = AU = US + 4, EU = US + 32, FR = US + 34, IT = US + 38, JP = US + 5.
Example
Inputs: US size (US) = US 4. Result: Japanese size (JP): 9; Letter size: S.
Limits and caveats
- Based on the common retail conversion chart, not a binding official standard. Chart used: UK = AU = US + 4, EU = US + 32, FR = US + 34, IT = US + 38, JP = US + 5.
- Brands differ and can be a full size apart, so check the brand chart before you order.
- Japanese sizes above 19 are rare in stores, so those rows extend the same chart.
Questions about this tool
What is a US 4 in Japanese sizes?
It is a Japanese 9 on the common chart, which is a letter size S.
How do US and Japanese sizes differ?
On this chart the Japanese number is 5 higher than the US number at every step. Japanese sizes follow the odd numbering of Japanese labels, such as 7, 9 and 11.
Does the result hold for every brand?
No. This is a general reference chart and a brand can run a full size off it. Compare your bust, waist and hip measurements with the brand chart before buying.