👙 Bra Size
30B Bra Size — UK, EU & French Conversion
A US 30B bra in UK, European and French sizing, with its sister sizes. Not sure 30B is right? Measure with the bra calculator first.
US 30B = UK 30B
EU 65B · French 80B
A US 30B bra converts to UK 30B, EU 65B and French 80B. The band number maps on a fixed scale, while cup letters shift between systems above D.
| Region | Size |
|---|---|
| US | 30B |
| UK | 30B |
| EU (Europe) | 65B |
| FR / ES (France, Spain) | 80B |
Sister sizes for 30B
Same cup volume, different band — try these if the band feels tight or loose but the cup is right:
28CSister down
32ASister up
⚠️ US cup lettering above D varies by brand (DD vs E, DDD vs F). Match by the EU/UK equivalent when a brand's letters differ.
All bra sizes → · Bra calculator → · Converter →
What is a US 30B bra in UK and EU sizing?
A US 30B is a UK 30B, EU 65B and French 80B.
What are the sister sizes of 30B?
Same cup volume, different band: 28C, 32A.
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