Question 1

Is a 40F the same in every brand?

Accepted Answer

No - a 40F isn't identical across brands, because brands use different sizing systems and cup depths. Here's how a standard US 40F translates in the brands we track: ThirdLove 40DDD, Wacoal 40DDD, Panache 40E, Bravissimo 40E, Freya 40E, Elomi 40E, Glamorise 40DDD, b.tempt'd 40DDD, Fantasie 40E. SHEFIT, Kindred Bravely, ENELL size by their own chart instead of band/cup.

Question 2

What are the sister sizes for 40F?

Accepted Answer

40F's sister sizes — same cup volume, different band — are 38G and 42DDD. Try a sister size if the band feels too tight or loose but the cup still fits.

40F Bras

Your 40F across brands

Apollo Sports Bra - Burgundy

Apollo Sports Bra - Leopard Print

Move 360 Sports Bra - Chocolate Brown

Move 360 Sports Bra - Teal

Square Neck Tank Top with Built-in Bra - Khaki

Square Neck Tank Top with Built-in Bra - Black

Brand	How it runs	Your 40F →
ThirdLove	cups run generous	40DDD
Wacoal	true to size	40DDD
Panache	true to size	40E
Bravissimo	true to size	40E