Is a 38K the same in every brand?

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

What are the sister sizes for 38K?

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

38K Bras

What is a 38K in other brands?

461 bras tracked in 38K · 7 brands · See all K cup

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

Your 38K across brands

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

Brand	How it runs	Your 38K →
ThirdLove	cups run generous	38K
Wacoal	true to size	38K
Panache	true to size	38H
Bravissimo	true to size	38H

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

Editorial buying guide

Read the 38K buying guide

Top picks, sister sizes, and how to spot a good 38K fit.

Read →

Sister sizes

36L 40J What are sister sizes?

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Your 38K across brands

Nina Balcony Bra - Blue Bows

MagicLift Front-Closure Posture Back Bra Blue

MagicLift Front-Closure Posture Back Bra White

Rosa Balcony Bra - Rose Gold

Rosa Balcony Bra - Cobalt/Latte

Eleanor Nursing Bra - Latte

Envy Plunge Bra - Sky Blue

Tango Essence Plunge Bodysuit - Obsidian

Porcelain Elan Non Padded T Shirt Bra - Chai

Porcelain Elan Non Padded T Shirt Bra - Black

Botanical Balcony Tankini Top - Botanical Floral

Ottilie Low Balcony Bra - Black

Eden Balcony Bra - Black

Ashley Padded Balcony Bra - Black

Eden Balcony Bra - Pink

Non Wired Sports Bra - Black

Non Wired Sports Bra - Latte

Boundless Non Wired Sports Bra - Abstract Animal

Envy Full Cup Bra - Chai

Envy Full Cup Bra - Chestnut

Envy Full Cup Bra - Teal

Allure Full Cup Bra - Forest Green

Bliss Full Cup Bra - Rose Print

Jennifer Plunge Bikini Top - Aurora Red

Allure Demi Balcony Bra - Champagne Gold

Sophia Plunge Bra - Red

Back Appeal® H-K Cup Underwire Bra: Cradle Pink

Back Appeal® H-K Cup Underwire Bra: Regina Red

Naomi Nursing Bra - Noir

Ella Plunge Bra - Black Sequin

Josephine Full Cup Bra - Forest Green

Eva Balcony Tankini Top - Sicily Print

Iris Balcony Tankini Top - Green Gingham

Anya Riva Balcony Tankini Top - Black

Estel Full Cup Bra - Cherry Red

Marlene Balcony Bra - Black

Etta Bra - White Multi

Mykonos Plunge Swimsuit - Teal

Florence Bra - White/Lime

Paloma Balcony Swimsuit - Black Sand Print

Paloma Balcony Swimsuit - Flutter Print

Quinn Plunge Bra: Cameo

Quinn Plunge Bra: Black

Delilah Bra - Heart Print

Melrose Bra - White

Melrose Bra - Beige

MagicLift Active Support Bra Gray Heather

MagicLift Active Support Bra Cafe

MagicLift Active Support Bra White

MagicLift Active Support Bra Black

Tango Essence Balcony Bra - Honey

Tango Essence Balcony Bra - Black

Etta Bra - Multi

Niya Bra - Leopard Print

Dream Full Cup Bra - Navy

Freya Fancies Balcony Bra (GG - K Cup): White

Freya Fancies Balcony Bra (GG - K Cup): Natural Beige

Freya Fancies Balcony Bra (GG - K Cup): Black

Esther Bra - Multi Floral

Blossom Balcony Bra - Taupe