A 40 fits an underbust of 34.5 to under 36.5 inches (87.6 to under 92.7 cm); in European sizing it is roughly a 90.
| Underbust | 34.5 to under 36.5 inches |
|---|---|
| Underbust (cm) | 87.6 to under 92.7 cm |
| European sizing | Roughly 90 |
The cup letter is a separate measurement on top of this: see size number and cup explained for how the two combine, or use Pink Pearl's sizing calculator to get both at once, checked against what is actually in stock right now.
If 40 is not quite right
If a measurement falls close to the edge of this range, the neighbouring size is worth trying: 38 or 42. A loose band works its way up the back during the day, while a tight one leaves a mark or pinches on a deep breath.
Not every cup letter is in stock in every size at every moment, since stock rotates: the products shown on this page are what is actually available in 40 right now, not a fixed catalogue.
Browse our bra catalogue or see the bra style guide for what's available in this size.