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38I Bra Size — UK, EU & French Conversion

A US 38I bra in UK, European and French sizing, with its sister sizes. Not sure 38I is right? Measure with the bra calculator first.

Reviewed by the 247Sizing teamLast updated: 27 August 2026
US 38I = UK 38G
EU 85I · French 100I

A US 38I bra converts to UK 38G, EU 85I and French 100I. The band number maps on a fixed scale, while cup letters shift between systems above D.

RegionSize
US38I
UK38G
EU (Europe)85I
FR / ES (France, Spain)100I

Sister sizes for 38I

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

36JSister down
40HSister 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.

36I · 40I · 38H · 38J

All bra sizes → · Bra calculator → · Converter →

What is a US 38I bra in UK and EU sizing?

A US 38I is a UK 38G, EU 85I and French 100I.

What are the sister sizes of 38I?

Same cup volume, different band: 36J, 40H.

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