Is a 40J the same in every brand?

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

What are the sister sizes for 40J?

40J's sister sizes — same cup volume, different band — are 38K and 42I. Try a sister size if the band feels too tight or loose but the cup still fits.

40J Bras

What is a 40J in other brands?

407 bras tracked in 40J · 7 brands · See all J cup

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

Your 40J across brands

A 40J isn’t the same in every brand. Here’s how a standard US 40J translates across the brands we track — and how each one runs.

Brand	How it runs	Your 40J →
ThirdLove	cups run generous	40J
Wacoal	true to size	40J
Panache	true to size	40GG
Freya	band runs small	40GG

What is a 40J in other brands? See all 30+ brands →

Editorial buying guide

Read the 40J buying guide

Top picks, sister sizes, and how to spot a good 40J fit.

Read →

Sister sizes

38K 42I What are sister sizes?

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Your 40J across brands

Smooth Molded Bra: Midnight

Smooth Molded Bra: Heather

Smooth Molded Bra: Haute Red

Smooth Molded Bra: Clove

Smooth Molded Bra: 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

Rocha Non Wired Bra - Misty Rose

Tango Balcony Bra - Honey

Tango Balcony Bra - Blush

Tango Balcony Bra - Black

Rocha Non Wired Bra - Black

Avery Bra - Ivory

Avery Bra - Black

Dream Full Cup Bra - Pistachio

Clara Full Cup Bra - Orchid/Red

Amelia Bra - Cobalt/Gold

Cici Non Wired Bra - Blush Pink

Lacey Bloom Bra - Deep Red

Etta Bra - Black

Amelia Bra - Off White/Black

Fusion Lace Side Support Bra: Black

Fusion Lace Side Support Bra: Blush

Reflect Side Support Bra: Red

Reflect Side Support Bra: Navy

Reflect Side Support Bra: Natural Beige

Reflect Side Support Bra: Black

Lucia Side Support Bra: Rosewater

Lucia Side Support Bra: Blue Garden

Lucie Stretch Plunge Bra: Midnight

Charley Stretch Plunge Bra: Fawn

Charley Stretch Plunge Bra: Black

Charley Stretch Plunge Bra: Ballet Pink

Charley Plunge Bra: Jet

Sachi Plunge Bra: Cafe Au Lait

Sachi Plunge Bra: Black

Morgan Stretch Banded Bra: Dark Romance

Reja Plunge Bra: Black

Nerina Stretch Plunge Bra: Rouge

Zarla Stretch Banded Bra: Sapphire

Namrah Bandless Plunge Bra: Pale Blush

Kintai Plunge Bra: Black

Retro Chic Full Figure Underwire Bra: Toast

Florence Bra - Black

Millie Bra - Deep Red

Millie Bra - Deep Green

Daisy Bra - Green Floral

Millie Bloom Bra - Red/Pink

Esmae Bra - Forest Green

Millie Bloom Bra - White

Millie Bra - Hazelnut

Esi Bra - Purple Multi

Lucie Stretch Plunge Bra: Wildcat

Lucie Stretch Plunge Bra: White

Lucie Stretch Plunge Bra: Pale Blush

Lucie Stretch Plunge Bra: Mocha