Is a 34O the same in every brand?

No — a 34O isn't identical across brands, because brands use different sizing systems and cup depths. Here's how a standard US 34O translates in the brands we track: ThirdLove 34AA, Wacoal 34AA, Panache 34AA, Freya 34AA, Elomi 34AA, Glamorise 34AA, SHEFIT 34AA, b.tempt'd 34AA, Kindred Bravely 34AA, ENELL 34AA, Fantasie 34AA.

What are the sister sizes for 34O?

34O's sister sizes — same cup volume, different band — are 36N. Try a sister size if the band feels too tight or loose but the cup still fits.

34O Bras

126 bras tracked in 34O · 3 brands · See all O cup

Brands: Elomi, Freya, Panache

Your 34O across brands

A 34O isn’t the same in every brand. Here’s how a standard US 34O translates across the brands we track — and how each one runs.

Brand	How it runs	Your 34O →
ThirdLove	cups run generous	34AA
Wacoal	true to size	34AA
Panache	true to size	34AA
Freya	band runs small	34AA
Elomi	cups run generous	34AA
Glamorise	true to size	34AA
SHEFIT	true to size	34AA
b.tempt'd	true to size	34AA
Kindred Bravely	true to size	34AA
ENELL	true to size	34AA
Fantasie	true to size	34AA

Translate across all 30+ brands →

Editorial buying guide

Read the 34O buying guide

Top picks, sister sizes, and how to spot a good 34O fit.

Read →

Sister sizes

36N What are sister sizes?

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Your 34O across brands

Kira Active Balcony Swimsuit - Mulberry

Tango Balcony Bra - Nutmeg

Tango Balcony Bra - Navy

Rocha Low Front Balcony Bra - Peacock Blue

Envy Full Cup Bra - Indigo

Envy Full Cup Bra - Emerald Leopard

Rocha Low Front Balcony Bra - Garnet Rose

Envy Full Cup Bra - Terracotta

Harmony Plunge Bra - Hot Pink

Bliss Full Cup Bra - Lilac

Botanical Balcony Bikini Top - Botanical Floral

Estel Full Cup Bra - Royal Blue

Estel Full Cup Bra - Sage

Josephine Full Cup Bra - Magenta/Latte

Josephine Full Cup Bra - Cobalt/Latte

Natalia Full Cup Bra - Bordeaux Red

Tango Balcony Bra - Chai

Upbeat Wired Sports Bra - Blue

Botanical Balcony Tankini Top - Botanical Floral

Envy Full Cup Bra - Chai

Envy Full Cup Bra - Chestnut

Envy Full Cup Bra - Teal

Bliss Full Cup Bra - Rose Print

Ella Plunge Bra - Black Sequin

Josephine Full Cup Bra - Forest Green

Eva Balcony Tankini Top - Sicily Print

Renee Balcony Tankini Top - Navy Gingham

Iris Balcony Tankini Top - Green Gingham

Estel Full Cup Bra - Cherry Red

Activate Wired Sports Bra - Black/Chalk

Paloma Balcony Swimsuit - Black Sand Print

Paloma Balcony Swimsuit - Capri Print

Paloma Balcony Swimsuit - Navy Gingham

Paloma Balcony Swimsuit - Green Gingham

Dream Full Cup Bra - Navy

Freya Fancies Balcony Bra (GG - K Cup): White

Freya Fancies Balcony Bra (GG - K Cup): Natural Beige

Freya Fancies Balcony Bra (GG - K Cup): Black

Starlight Side Support Balcony Bra (J - O Cup): Caramel

Starlight Side Support Balcony Bra (J - O Cup): Black

Viva Side Support Bra: Lace Natural Beige

Tango Edit Balcony Bra - White

Anya Riva Spot Balcony Swimsuit - Navy/Vanilla

Offbeat Side Support Bra: Rosehip

Offbeat Side Support Bra: Natural Beige

Offbeat Side Support Bra: Black

Cate Allure Full Cup Banded Bra: Deep Emerald

Anya Riva Balcony Swimsuit - Black

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

Reja Plunge Bra: Black

Zarla Stretch Banded Bra: Sapphire

Namrah Bandless Plunge Bra: Pale Blush

Nina Balcony Bra - Black Leopard

Morgan Stretch Banded Bra: Cameo Rose

Lucie Stretch Plunge Bra: Wildcat

Lucie Stretch Plunge Bra: White

Lucie Stretch Plunge Bra: Pale Blush

Lucie Stretch Plunge Bra: Mocha

Lucie Stretch Plunge Bra: Mist

Lucie Stretch Plunge Bra: Black

Morgan Stretch Banded Bra: White

Morgan Stretch Banded Bra: Sahara

Morgan Stretch Banded Bra: Midnight

Morgan Stretch Banded Bra: Haute Red

Morgan Stretch Banded Bra: Black

Morgan Stretch Banded Bra: Toasted Almond

Morgan Stretch Banded Bra: Hot House

Morgan Stretch Banded Bra: Ebony

Tiernie Stretch Plunge Bra: Sahara

Serene Full Cup Bra - Noir