Is a 42O the same in every brand?

No - a 42O isn't identical across brands, because brands use different sizing systems and cup depths. Here's how a standard US 42O translates in the brands we track: ThirdLove 42O, Wacoal 42O, Panache 42K, Bravissimo 42K, Freya 42K, Elomi 42K, Glamorise 42O, b.tempt'd 42O, Fantasie 42K. SHEFIT, Kindred Bravely, ENELL size by their own chart instead of band/cup.

What are the sister sizes for 42O?

42O's sister sizes — same cup volume, different band — are 44N. Try a sister size if the band feels too tight or loose but the cup still fits.

42O Bras

What is a 42O in other brands?

44 bras tracked in 42O · 2 brands · See all O cup

Brands: Elomi, Panache

Your 42O across brands

A 42O isn’t the same in every brand. Here’s how a standard US 42O translates across the brands we track — and how each one runs.

Brand	How it runs	Your 42O →
ThirdLove	cups run generous	42O
Wacoal	true to size	42O
Panache	true to size	42K
Bravissimo	true to size	42K
Freya	band runs small	42K
Elomi	cups run generous	42K
Glamorise	true to size	42O
SHEFIT	-	Sizes by brand chart
b.tempt'd	true to size	42O
Kindred Bravely	-	Sizes by brand chart
ENELL	-	Sizes by brand chart
Fantasie	true to size	42K

Translate across all 30+ brands →

Editorial buying guide

Read the 42O buying guide

Top picks, sister sizes, and how to spot a good 42O fit.

Read →

Sister sizes

44N What are sister sizes?

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Your 42O across brands

Tango Balcony Bra - Nutmeg

Tango Balcony Bra - Navy

Harmony Plunge Bra - Hot Pink

Bliss Full Cup Bra - Lilac

Estel Full Cup Bra - Royal Blue

Estel Full Cup Bra - Sage

Josephine Full Cup Bra - Cobalt/Latte

Natalia Full Cup Bra - Bordeaux Red

Tango Balcony Bra - Chai

Bliss Full Cup Bra - Rose Print

Ella Plunge Bra - Black Sequin

Josephine Full Cup Bra - Forest Green

Estel Full Cup Bra - Cherry Red

Paloma Balcony Swimsuit - Navy Gingham

Dream Full Cup Bra - Navy

Tango Edit Balcony Bra - White

Cate Full Cup Banded Bra: White

Cate Full Cup Banded Bra: Latte

Cate Full Cup Banded Bra: Hazel

Cate Full Cup Banded Bra: Black

Cate Allure Full Cup Banded Bra: Sahara

Cate Allure Full Cup Banded Bra: Black

Tango Balcony Bra - Honey

Tango Balcony Bra - Blush

Tango Balcony Bra - Black

Dream Full Cup Bra - Pistachio

Morgan Stretch Banded Bra: Sahara

Morgan Stretch Banded Bra: Black

Molly Nursing Bra: Cameo Rose

Molly Nursing Bra: Black

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