Is a 34I the same in every brand?

No - a 34I isn't identical across brands, because brands use different sizing systems and cup depths. Here's how a standard US 34I translates in the brands we track: ThirdLove 34I, Wacoal 34I, Panache 34G, Bravissimo 34G, Freya 34G, Elomi 34G, Glamorise 34I, b.tempt'd 34I, Fantasie 34G. SHEFIT, Kindred Bravely, ENELL size by their own chart instead of band/cup.

What are the sister sizes for 34I?

34I's sister sizes — same cup volume, different band — are 32J and 36H. Try a sister size if the band feels too tight or loose but the cup still fits.

34I Bras

What is a 34I in other brands?

529 bras tracked in 34I · 7 brands · See all I cup

Brands: Elomi, Fantasie, Freya, Glamorise, Panache, ThirdLove, Wacoal

Your 34I across brands

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

Brand	How it runs	Your 34I →
ThirdLove	cups run generous	34I
Wacoal	true to size	34I
Panache	true to size	34G
Bravissimo	true to size	34G

What is a 34I in other brands? See all 30+ brands →

Editorial buying guide

Read the 34I buying guide

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

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Sister sizes

32J 36H What are sister sizes?

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Your 34I across brands

365 Moulded Strapless Bra - Honey

Freedom Non Wired Sports Bra - Black/Chalk

Power Wired Sports Bra - White

Endurance Wired Sports Bra - Black

Power Wired Sports Bra - Latte

Endurance Wired Sports Bra - Dusty Rose

Entice Full Cup Bra - Red

Endurance Wired Sports Bra - Berry/Chalk

Endurance Wired Sports Bra - Sienna Rose

Back Appeal® H-K Cup Wire Free Bra: Black

Back Appeal® H-K Cup Wire Free Bra: Rose Dust

Bette Balcony Bikini Top - Teal Blue

Lillia Balconette Bra: White

Lillia Side Support Bra: White

Magdalena Spacer Molded Bra: Vintage Green

Magdalena Spacer Molded Bra: Noir

Magdalena Spacer Molded Bra: Natural Beige

Magdalena Balconette Bra: Vintage Green

Magdalena Balconette Bra: Noir

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

Portia Balconette Bra: Red

Portia Side Support Bra: Red

Endurance Wired Sports Bra - Black/Latte

Dana Balcony Strapless Bra - Linen

Dana Balcony Strapless Bra - Black

Dana Strapless Balcony Bra - Caramel

Estel Full Cup Bra - Honey

Estel Full Cup Bra - Noir

Estel Full Cup Bra - Navy

Dana Balcony Strapless Bra - Hazel

Lara Plunge Swimsuit - Aurora Red

Sienna Balcony Tankini Top - Polka Dot Print

Iris Balcony Tankini Top - Red Gingham

Iris Balcony Tankini Top - Black Gingham

Isabella Balcony Swimsuit - Polka Dot Print

Selena Plunge Tankini Top - Cobalt

Paloma Balcony Swimsuit - Red Gingham

Paloma Balcony Swimsuit - Black Gingham

Rita Plunge Swimsuit - Black

Monica Balcony Swimsuit - Liliflora Print

Monica Balcony Swimsuit - Teal Blue

Lara Plunge Swimsuit - Aurora Black/White

Rita Plunge Swimsuit - Cobalt

Rita Plunge Swimsuit - Red

Gigi Balcony Swimsuit - Sparkle Teal