👙 Bra Size
30I Bra Size — UK, EU & French Conversion
A US 30I bra in UK, European and French sizing, with its sister sizes. Not sure 30I is right? Measure with the bra calculator first.
US 30I = UK 30G
EU 65I · French 80I
A US 30I bra converts to UK 30G, EU 65I and French 80I. The band number maps on a fixed scale, while cup letters shift between systems above D.
| Region | Size |
|---|---|
| US | 30I |
| UK | 30G |
| EU (Europe) | 65I |
| FR / ES (France, Spain) | 80I |
Sister sizes for 30I
Same cup volume, different band — try these if the band feels tight or loose but the cup is right:
28JSister down
32HSister 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 30I bra in UK and EU sizing?
A US 30I is a UK 30G, EU 65I and French 80I.
What are the sister sizes of 30I?
Same cup volume, different band: 28J, 32H.
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