326 bras tracked in 40I · 7 brands · See all I cup
Brands: Elomi, Fantasie, Freya, Glamorise, Panache, ThirdLove, Wacoal
A 40I isn’t the same in every brand. Here’s how a standard US 40I translates across the brands we track — and how each one runs.
Read the 40I buying guide
Top picks, sister sizes, and how to spot a good 40I fit.




































































































































































































































































































































