Is a 42B the same in every brand?

No — a 42B isn't identical across brands, because brands use different sizing systems and cup depths. Here's how a standard US 42B translates in the brands we track: ThirdLove 42B, Wacoal 42B, Panache 42B, Freya 42B, Elomi 42B, Glamorise 42B, SHEFIT 42B, b.tempt'd 42B, Kindred Bravely 42B, ENELL 42B, Fantasie 42B.

What are the sister sizes for 42B?

42B's sister sizes — same cup volume, different band — are 40C and 44A. Try a sister size if the band feels too tight or loose but the cup still fits.

42B Bras

118 bras tracked in 42B · 3 brands · See all B cup

Brands: Elomi, Glamorise, ThirdLove

Your 42B across brands

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

Brand	How it runs	Your 42B →
ThirdLove	cups run generous	42B
Wacoal	true to size	42B
Panache	true to size	42B
Freya	band runs small	42B
Elomi	cups run generous	42B
Glamorise	true to size	42B
SHEFIT	true to size	42B
b.tempt'd	true to size	42B
Kindred Bravely	true to size	42B
ENELL	true to size	42B
Fantasie	true to size	42B

Translate across all 30+ brands →

Sister sizes

40C 44A What are sister sizes?

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Your 42B across brands

Front-Closure Zip Up Sports Bra Lavender

Lace Contour Plunge Bra: Soft-Pink

Lace Contour Plunge Bra: Black

All Day Lace T-Shirt Bra: Charcoal

Front-Closure Stretch Lace WonderWire Bra White

Front-Closure Stretch Lace WonderWire Bra Cafe

Front-Closure Stretch Lace WonderWire Bra Black

Front-Closure Stretch Lace WonderWire Bra Apricot

MagicLift Natural Shape Support Bra Black

MagicLift Original Support Bra White

MagicLift Original Support Bra Soft Gray

MagicLift Original Support Bra Glacier

MagicLift Original Support Bra Folkstone Gray

MagicLift Original Support Bra Dark Teal

MagicLift Original Support Bra Burgundy

MagicLift Original Support Bra Blue

MagicLift Original Support Bra Black

MagicLift Original Support Bra Blush

MagicLift Seamless Sports Bra Charcoal Gray

MagicLift Seamless Sports Bra White

MagicLift Seamless Sports Bra Frosted Aqua

MagicLift Seamless Sports Bra Cafe

MagicLift Seamless Sports Bra Black

MagicLift Front-Closure Posture Back Bra Blue

MagicLift Front-Closure Posture Back Bra White

MagicLift Front-Closure Posture Back Bra Cafe

MagicLift Front-Closure Posture Back Bra Black

Front-Closure Posture Back WonderWire Lace Bra Cafe

Front-Closure Posture Back WonderWire Lace Bra Black

Front-Closure WonderWire Bra Cafe Print

Front-Closure WonderWire Bra Black

Front-Closure WonderWire Bra White

Front-Closure WonderWire Bra Centennial Leopard

Front-Closure WonderWire Bra Floral Print

Front-Closure WonderWire Bra Dark Denim

Front-Closure WonderWire Bra Cafe

Front-Closure WonderWire Bra Navy Print

Front-Closure Zip Up Sports Bra Blue Tie-Dye

24/7® Classic Strapless Bra: Taupe

24/7® Classic T-Shirt Bra: Mist

24/7® Classic Second Skin Unlined Bra: Taupe

24/7® Classic Second Skin Unlined Bra: Black

24/7® Classic T-Shirt Bra: Siren

Kinetic Adjustable Sports Bra: Rain

Deco Lace Unlined Bra: Vintage-Blue

Deco Lace Unlined Bra: Black

24/7® Classic Strapless Bra: Black

24/7® Classic Second Skin Unlined Bra: Rose-Dust

24/7® Classic Second Skin Unlined Bra: Mocha

Kinetic Adjustable Sports Bra: Rose-Dust

Organic Cloud Cotton Perfect Coverage Bra: Rose-Dust

24/7® Classic Uplift Plunge Bra: Rose-Dust

24/7® Classic Uplift Plunge Bra: Mocha

24/7® Classic Uplift Plunge Bra: Moss

Organic Cloud Cotton T-Shirt Bra: Black

24/7® Classic Uplift Plunge Bra: Taupe

24/7® Classic Uplift Plunge Bra: Black

Organic Cloud Cotton Perfect Coverage Bra: Black

MagicLift Front-Closure Natural Shape Bra Black

MagicLift Front-Closure Support Bra White

MagicLift Front-Closure Support Bra Blush

MagicLift Front-Closure Racerback Bra Cafe

MagicLift Front-Closure Racerback Bra Black

MagicLift Moisture Control Bra Gray Heather

MagicLift Moisture Control Bra Cafe Heather

MagicLift Cotton Support Bra White

MagicLift Cotton Support Bra Cafe

MagicLift Cotton Support Bra Black

Front-Closure Lacey T-Back WonderWire Bra Solid Black

Front-Closure Lacey T-Back WonderWire Bra Black Plum

Front-Closure Lacey T-Back WonderWire Bra Black

Front-Closure Cotton WonderWire Bra Silver

Front-Closure Cotton WonderWire Bra White

Front-Closure Cotton WonderWire Bra Cafe

Low Cut WonderWire Lace Bra Cafe

Low Cut WonderWire Lace Bra Black

MagicLift Seamless Firm Support Bra White

MagicLift Seamless Firm Support Bra Cafe

MagicLift Seamless Firm Support Bra Black