Is a 36I the same in every brand?

No - a 36I isn't identical across brands, because brands use different sizing systems and cup depths. Here's how a standard US 36I translates in the brands we track: ThirdLove 36I, Wacoal 36I, Panache 36G, Bravissimo 36G, Freya 36G, Elomi 36G, Glamorise 36I, b.tempt'd 36I, Fantasie 36G. SHEFIT, Kindred Bravely, ENELL size by their own chart instead of band/cup.

What are the sister sizes for 36I?

36I's sister sizes — same cup volume, different band — are 34J and 38H. Try a sister size if the band feels too tight or loose but the cup still fits.

36I Bras

What is a 36I in other brands?

573 bras tracked in 36I · 7 brands · See all I cup

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

Your 36I across brands

A 36I isn’t the same in every brand. Here’s how a standard US 36I translates across the brands we track — and how each one runs.

Brand	How it runs	Your 36I →
ThirdLove	cups run generous	36I
Wacoal	true to size	36I
Panache	true to size	36G
Bravissimo	true to size	36G

What is a 36I in other brands? See all 30+ brands →

Editorial buying guide

Read the 36I buying guide

Top picks, sister sizes, and how to spot a good 36I fit.

Read →

Sister sizes

34J 38H What are sister sizes?

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Your 36I across brands

Katherine Nursing Bra - Black

Boundless Non Wired Sports Bra - Black

Boundless Non Wired Sports Bra - Berry/Chalk

Allure Spacer T Shirt Bra - Black

Rose Lace Unlined Demi Bra: Sea-Salt

Envisage Spacer Molded Bra: Natural Beige

Envisage Spacer Molded Bra: Black

Emmaline Spacer Molded Bra: Natural Beige

Emmaline Spacer Molded Bra: Midnight

Emmaline Spacer Molded Bra: Blossom

Reflect Spacer Molded Bra: Red

Reflect Spacer Molded Bra: Navy

Reflect Spacer Molded Bra: Natural Beige

Reflect Spacer Molded Bra: Black

Charley Bandless Spacer Molded Bra: Fawn

Charley Bandless Spacer Molded Bra: Black

Charley Bandless Spacer Molded Bra: Ballet Pink

Nerina Spacer Molded Bra: Sahara

Nerina Spacer Molded Bra: Black

Clara Full Cup Bra - Chai

Allure Full Cup Bra - Ivory

Allure Full Cup Bra - Black/Latte

Bliss Full Cup Bra - Hazel

Bliss Full Cup Bra - Noir

Clara Full Cup Bra - Charc/Black

Clara Full Cup Bra - Honey

Allure Full Cup Bra - Azure Blue

Bliss Full Cup Bra - Rose Pink

Allure Full Cup Bra - True Red

Allure Full Cup Bra - Honey

Magdalena Side Support Bra: Vintage Green

Magdalena Side Support Bra: Noir

Magdalena Side Support Bra: Natural Beige

Esme Balcony Bra - Mocha Animal

Esme Balcony Bra - Black Animal

Ana Nursing Bra - Vintage

Lauren Plunge Bikini Top - Black

Lauren Plunge Bikini Top - Cobalt

Amara Full Cup Bra - Honey

Amara Full Cup Bra - Black

Lauren Plunge Bikini Top - Red

365 Moulded Strapless Bra - Black

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 Underwire Bra: Black

Back Appeal® H-K Cup Underwire Bra: Rose Dust

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