Is a 38B the same in every brand?

No - a 38B isn't identical across brands, because brands use different sizing systems and cup depths. Here's how a standard US 38B translates in the brands we track: ThirdLove 38B, Wacoal 38B, Panache 38B, Freya 38B, Elomi 38B, Glamorise 38B, b.tempt'd 38B, Fantasie 38B. SHEFIT, Kindred Bravely, ENELL size by their own chart instead of band/cup.

What are the sister sizes for 38B?

38B's sister sizes — same cup volume, different band — are 36C and 40A. Try a sister size if the band feels too tight or loose but the cup still fits.

38B Bras

What is a 38B in other brands?

329 bras tracked in 38B · 7 brands · See all B cup

Brands: Fantasie, Freya, Glamorise, Panache, ThirdLove, Wacoal, b.tempt'd

Your 38B across brands

A 38B isn’t the same in every brand. Here’s how a standard US 38B translates across the brands we track — and how each one runs.

Brand	How it runs	Your 38B →
ThirdLove	cups run generous	38B
Wacoal	true to size	38B
Panache	true to size	38B
Freya	band runs small	38B

What is a 38B in other brands? See all 30+ brands →

Sister sizes

36C 40A What are sister sizes?

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Your 38B across brands

Perfect Primer Push Up Bra: Sand

Comfort First Wire Free T-Shirt Bra: Black

Comfort First Wire Free T-Shirt Bra: Sand

Comfort First Wire Free T-Shirt Bra: Roebuck

Modern Affair Plunge Underwire Bra: Silver Pine/Black

Modern Affair T-Shirt Bra: Silver Pine/Black

Comfort First T-Shirt Bra: Black

Comfort First T-Shirt Bra: Orchid Hush

Comfort First T-Shirt Bra: Sand

Comfort First T-Shirt Bra: Roebuck

Embrace Lace® T-Shirt Bra: Sand/Ivory

Embrace Lace® T-Shirt Bra: Black

Embrace Lace® T-Shirt Bra: Lavender Sage/Dark Purple

La Femme Underwire T-Shirt Bra: Sand

Awareness Full Figure Seamless Wire Free Bra: Sand

Modern Affair Plunge Underwire Bra: White

Modern Affair Plunge Underwire Bra: Night Sky/Black

Modern Affair Plunge Underwire Bra: Rose Dust/Angel Wing

Modern Affair T-Shirt Bra: Night Sky/Black

Modern Affair T-Shirt Bra: Rose Dust/Angel Wing

La Femme Underwire T-Shirt Bra: Adriatic Blue

Zero Edge™ Contour Bra: Taupe

Zero Edge™ Contour Bra: Leopard

Zero Edge™ Contour Bra: Black

Custom Control Sports Bra White

Custom Control Sports Bra Black

Custom Control Sports Bra Black/Gray

Deco Moulded Plunge Molded Plunge Bra: Nude

Deco Moulded Plunge Molded Plunge Bra: Black

Molded Balcony Bra: Natural Beige

Rose Lace Unlined Demi Bra: Red

ComfortStretch Front Close T-Shirt Bra: Black

ComfortStretch Smoothing Full Coverage Bra: Black

ComfortStretch Back Smoothing T-Shirt Bra: Taupe

ComfortStretch Back Smoothing T-Shirt Bra: Black

All Day Lace T-Shirt Bra: Black

Thermoregulating TempSync™ T-Shirt Bra: Mocha

Thermoregulating TempSync™ T-Shirt Bra: Macaron

ComfortStretch Back Smoothing T-Shirt Bra: Petal

ComfortStretch Smoothing Full Coverage Bra: Petal

All Day Lace Uplift Plunge Bra: Black

All Day Lace T-Shirt Bra: Taupe

ComfortStretch Smoothing Full Coverage Bra: Taupe

Thermoregulating TempSync™ T-Shirt Bra: Taupe

Thermoregulating TempSync™ T-Shirt Bra: Black

ComfortStretch Front Close T-Shirt Bra: Taupe

ComfortStretch Smoothing Full Coverage Bra: Dreamy-Lilac

All Day Lace Uplift Plunge Bra: Sea-Salt

Elevated Allure Wire Free Bra: Black

Elevated Allure Wire Free Bra: Rose Dust

High Impact Underwire Sports Bra Cafe

High Impact Underwire Sports Bra Black

Starlight Molded Bra: Caramel

Starlight Molded Bra: Black

Idol Molded Balcony Bra: Coffee Roast

Idol Molded Balcony Bra: Cinnamon

Idol Molded Balcony Bra: White

Idol Molded Balcony Bra: Nude

Idol Molded Balcony Bra: Black

Smoothing Molded Strapless Bra: Nude