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44J Bra Size — UK, EU & French Conversion

A US 44J bra in UK, European and French sizing, with its sister sizes. Not sure 44J is right? Measure with the bra calculator first.

Reviewed by the 247Sizing teamLast updated: 27 August 2026
US 44J = UK 44GG
EU 100J · French 115J

A US 44J bra converts to UK 44GG, EU 100J and French 115J. The band number maps on a fixed scale, while cup letters shift between systems above D.

RegionSize
US44J
UK44GG
EU (Europe)100J
FR / ES (France, Spain)115J

Sister sizes for 44J

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

42KSister down
46ISister 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.

42J · 46J · 44I · 44K

All bra sizes → · Bra calculator → · Converter →

What is a US 44J bra in UK and EU sizing?

A US 44J is a UK 44GG, EU 100J and French 115J.

What are the sister sizes of 44J?

Same cup volume, different band: 42K, 46I.

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