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48AA Bra Size — UK, EU & French Conversion

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

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

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

RegionSize
US48AA
UK48AA
EU (Europe)110AA
FR / ES (France, Spain)125AA

Sister sizes for 48AA

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

46ASister 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.

46AA · 48A

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

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

What are the sister sizes of 48AA?

Same cup volume, different band: 46A.

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