👙 Bra Size
34D Bra Size — UK, EU & French Conversion
A US 34D bra in UK, European and French sizing, with its sister sizes. Not sure 34D is right? Measure with the bra calculator first.
US 34D = UK 34D
EU 75D · French 90D
A US 34D bra converts to UK 34D, EU 75D and French 90D. The band number maps on a fixed scale, while cup letters shift between systems above D.
| Region | Size |
|---|---|
| US | 34D |
| UK | 34D |
| EU (Europe) | 75D |
| FR / ES (France, Spain) | 90D |
Sister sizes for 34D
Same cup volume, different band — try these if the band feels tight or loose but the cup is right:
32DDSister down
36CSister 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.
All bra sizes → · Bra calculator → · Converter →
What is a US 34D bra in UK and EU sizing?
A US 34D is a UK 34D, EU 75D and French 90D.
What are the sister sizes of 34D?
Same cup volume, different band: 32DD, 36C.
ⓘ Affiliate links below. As an Amazon Associate we earn from qualifying purchases at no extra cost to you.
★ Top pick · Recommended on Amazon
Bras (Multipack)
Everyday bras once you know your size.
View on Amazon →Recommended on Amazon
Bra Band Extenders
Adjust the band a touch without changing the cup.
View on Amazon →