Is a US 34B the same as a UK 34B?

Yes — for band sizes 32–40 and cups A through D, US and UK bra sizes use the same notation. The EU system uses a different band number (EU band = US band + 16 in cm, e.g. US 34 = EU 75).

Bra Size Converter

Convert US bra sizes to UK and EU equivalents. Enter US band size and cup letter.

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How to use this tool

Enter us band size and cup size in the fields above.
Results update instantly as you type — or click Calculate.
Read your uk size and the full breakdown beneath it.

Convert your US bra size to UK and EU equivalents quickly and accurately.

Frequently asked questions

Is a US 34B the same as a UK 34B?: Yes — for band sizes 32–40 and cups A through D, US and UK bra sizes use the same notation. The EU system uses a different band number (EU band = US band + 16 in cm, e.g. US 34 = EU 75).

References & sources

Wikipedia: Bra size