Question 1

Is a 40O the same in every brand?

Accepted Answer

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

Question 2

What are the sister sizes for 40O?

Accepted Answer

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

40O Bras

Your 40O across brands

Brianna Plunge Bra: Black

Priya Plunge Bra: Vanilla

Priya Plunge Bra: Black

Molly Nursing Bra: Black

Aerith Plunge Bra: Rose

Zarla Stretch Banded Bra: Rose Bud

Zarla Stretch Banded Bra: Cafe Au Lait

Serene Full Cup Bra - Vintage

Celeste Balcony Bra - Pistachio

Envy Full Cup Bra - Ivory

Envy Full Cup Bra - Navy

Envy Full Cup Bra - Black

Envy Full Cup Bra - Fuchsia Pink

Envy Full Cup Bra - Honey

Bliss Full Cup Bra - Hazel

Bliss Full Cup Bra - Noir

Bliss Full Cup Bra - Rose Pink

Amara Full Cup Bra - Honey

Amara Full Cup Bra - Black

Entice Full Cup Bra - Red

Muse Plunge Bra - Cameo Rose

Muse Plunge Bra - Black

Sophia Full Cup Bra - Teal Blue

Sophia Full Cup Bra - Sienna Rose

Sophia Full Cup Bra - Black

Estel Full Cup Bra - Honey

Estel Full Cup Bra - Noir

Estel Full Cup Bra - Navy

Iris Balcony Tankini Top - Red Gingham

Iris Balcony Tankini Top - Black Gingham

Paloma Balcony Swimsuit - Red Gingham

Paloma Balcony Swimsuit - Black Gingham

Brand	How it runs	Your 40O →
ThirdLove	cups run generous	40O
Wacoal	true to size	40O
Panache	true to size	40K
Bravissimo	true to size	40K