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28J Bra Size — UK, EU & French Conversion

A US 28J bra in UK, European and French sizing, with its sister sizes. Not sure 28J is right? Measure with the bra calculator first.

Reviewed by the 247Sizing teamLast updated: 27 August 2026
US 28J = UK 28GG
EU 60J · French 75J

A US 28J bra converts to UK 28GG, EU 60J and French 75J. The band number maps on a fixed scale, while cup letters shift between systems above D.

RegionSize
US28J
UK28GG
EU (Europe)60J
FR / ES (France, Spain)75J

Sister sizes for 28J

Same cup volume, different band — try these if the band feels tight or loose but the cup is right:

30ISister 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.

30J · 28I · 28K

All bra sizes → · Bra calculator → · Converter →

What is a US 28J bra in UK and EU sizing?

A US 28J is a UK 28GG, EU 60J and French 75J.

What are the sister sizes of 28J?

Same cup volume, different band: 30I.

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