US 40DDD to AU/NZ Bra Size
Conversion
US 40DDD = AU/NZ 18E
Sister sizes (same fit if your size is sold out):
20DD · 16F
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Full conversion chart
| Region | Size |
|---|---|
| US | 40DDD |
| UK | 40E |
| EU | 90F |
| France | 105F |
| AU/NZ | 18E |
About this conversion
A US 40DDD converts to a AU/NZ 18E. Bra sizes have two parts — the band (number) and the cup (letter) — and both are labelled differently across regions, which is why the same bra carries a different size in each country. Always check the brand's own size guide too, as cup grading varies between manufacturers.
If AU/NZ 18E is out of stock, the sister sizes above fit almost identically because they share the same cup volume.