Question 1

Is a 50K the same in every brand?

Accepted Answer

No — a 50K isn't identical across brands, because brands use different sizing systems and cup depths. Here's how a standard US 50K translates in the brands we track: ThirdLove 50K, Wacoal 50K, Panache 50H, Freya 50H, Elomi 50H, Glamorise 50K, SHEFIT 50K, b.tempt'd 50K, Kindred Bravely 50K, ENELL 50K, Fantasie 50H.

Question 2

What are the sister sizes for 50K?

Accepted Answer

50K's sister sizes — same cup volume, different band — are 48L. Try a sister size if the band feels too tight or loose but the cup still fits.

50K Bras

Your 50K across brands

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

MagicLift Active Support Bra Gray Heather

MagicLift Active Support Bra Cafe

MagicLift Active Support Bra White

MagicLift Active Support Bra Black

Brand	How it runs	Your 50K →
ThirdLove	cups run generous	50K
Wacoal	true to size	50K
Panache	true to size	50H
Freya	band runs small	50H
Elomi	cups run generous	50H
Glamorise	true to size	50K
SHEFIT	true to size	50K
b.tempt'd	true to size	50K
Kindred Bravely	true to size	50K
ENELL	true to size	50K
Fantasie	true to size	50H