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48I Bra Size — UK, EU & French Conversion

A US 48I bra in UK, European and French sizing, with its sister sizes. Not sure 48I is right? Measure with the bra calculator first.

Reviewed by the 247Sizing teamLast updated: 27 August 2026
US 48I = UK 48G
EU 110I · French 125I

A US 48I bra converts to UK 48G, EU 110I and French 125I. The band number maps on a fixed scale, while cup letters shift between systems above D.

RegionSize
US48I
UK48G
EU (Europe)110I
FR / ES (France, Spain)125I

Sister sizes for 48I

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

46JSister down
⚠️ 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.

46I · 48H · 48J

All bra sizes → · Bra calculator → · Converter →

What is a US 48I bra in UK and EU sizing?

A US 48I is a UK 48G, EU 110I and French 125I.

What are the sister sizes of 48I?

Same cup volume, different band: 46J.

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