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