US 40C to AU/NZ Bra Size
Conversion
US 40C = AU/NZ 18C
Sister sizes (same fit if your size is sold out):
20B · 16D
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Full conversion chart
| Region | Size |
|---|---|
| US | 40C |
| UK | 40C |
| EU | 90C |
| France | 105C |
| AU/NZ | 18C |
About this conversion
A US 40C converts to a AU/NZ 18C. 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 18C is out of stock, the sister sizes above fit almost identically because they share the same cup volume.