Converter

Bra Size Converter

Enter a size in one system to see it in UK, EU, FR and AU.

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Soft measuring tape used while comparing bra size systems

Conversion preview

US 34D = UK 34D

See EU, FR and AU labels from the same size record.

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How this works

This converter only returns matches that exist in the shared sizing data file. Cup labels above D differ by system, so use the result as a starting point and check the brand's own chart.

Result

UK 34D to US

34D

Base US record: 34D. UK 34D / EU 75D / FR 90D / AU 12D.

View full chartSize hubUKEUFRAU

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Everyday Fit Store

Placeholder for a broad size range and return-friendly basics.

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Placeholder for supportive everyday styles by band and cup.

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Soft Cup Edit

Placeholder for wire-free and lounge options.

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FAQ

Which systems can I convert?

The converter includes US, UK, EU, FR, and AU size labels for the current sizing range.

Why do some brands convert sizes differently?

Cup lettering and fit rules vary by brand, especially after DDD. Verified brand data is out of scope for this MVP.

Can I convert from EU or FR back to US?

Yes. Enter a size, choose its current system, and the tool shows the matching US record when it is in the dataset.