Is a 38M the same in every brand?

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

What are the sister sizes for 38M?

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

38M Bras

What is a 38M in other brands?

275 bras tracked in 38M · 4 brands · See all M cup

Brands: Elomi, Fantasie, Freya, Panache

Your 38M across brands

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

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

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

Editorial buying guide

Read the 38M buying guide

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

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Sister sizes

36N 40L What are sister sizes?

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Your 38M across brands

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

Bette Balcony Bikini Top - Teal Blue

Muse Plunge Bra - Cameo Rose

Muse Plunge Bra - Black

Sophia Full Cup Bra - Teal Blue

Sophia Full Cup Bra - Sienna Rose

Sophia Full Cup Bra - Black

Endurance Wired Sports Bra - Black/Latte

Dana Balcony Strapless Bra - Linen

Dana Balcony Strapless Bra - Black

Dana Strapless Balcony Bra - Caramel

Estel Full Cup Bra - Honey

Estel Full Cup Bra - Noir

Estel Full Cup Bra - Navy

Dana Balcony Strapless Bra - Hazel

Lara Plunge Swimsuit - Aurora Red

Iris Balcony Tankini Top - Red Gingham

Iris Balcony Tankini Top - Black Gingham

Selena Plunge Tankini Top - Cobalt

Paloma Balcony Swimsuit - Red Gingham

Paloma Balcony Swimsuit - Black Gingham

Rita Plunge Swimsuit - Black

Monica Balcony Swimsuit - Liliflora Print

Monica Balcony Swimsuit - Teal Blue

Lara Plunge Swimsuit - Aurora Black/White

Rita Plunge Swimsuit - Cobalt

Rita Plunge Swimsuit - Red

Gigi Balcony Swimsuit - Sparkle Teal