EU 90B to UK Bra Size
Conversion
EU 90B = UK 40B
Sister sizes (same fit if your size is sold out):
42A · 38C
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Full conversion chart
| Region | Size |
|---|---|
| US | 40B |
| UK | 40B |
| EU | 90B |
| France | 105B |
| AU/NZ | 18B |
About this conversion
A EU 90B converts to a UK 40B. 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 UK 40B is out of stock, the sister sizes above fit almost identically because they share the same cup volume.