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48DDD Bra Size — UK, EU & French Conversion

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

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

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

RegionSize
US48DDD
UK48E
EU (Europe)110F
FR / ES (France, Spain)125F

Sister sizes for 48DDD

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

46GSister 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.

46DDD · 48DD · 48G

All bra sizes → · Bra calculator → · Converter →

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

A US 48DDD is a UK 48E, EU 110F and French 125F.

What are the sister sizes of 48DDD?

Same cup volume, different band: 46G.

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