What is a bra "sister size"?

  • What is a bra "sister size"?

    If you've measured meticulously, shopped for your breast shape and your bra still isn't fitting perfectly, you might need to shift your sizing a bit. "A sister size refers to a bra size that has the same cup capacity with a different band size," says Seymour. "You should opt for a sister size when the cups fit but the band doesn’t," she advises.

    For example, if you try on a bra and the cups fit but the band is too tight, you can't just go up a band size: "You’ll actually end up with larger cups if you do this," Seymour explains. "Choose a sister size instead with a larger band for a better fit." The below chart makes easy work of finding your sister size:

  • a pink chart depicting sister sizes, 30a and 32aa, 30b and 32a and 34aa, 30c and 32b and 34a, 30d and 32c and 34b and 36a, 30e and 32d and 34c and 36b, 30f and 32e and 34d and 36c and 38b, 30g and 32f and 34e and 36d and 38c and 40b, 30h and 32g and 34f and 36e and 38d and 40c and 42b, 32h and 34g and 36f and 38e and 40d and 42c and 44b, 34h and 36g and 38f and 40e and 42d and 44c, 36h and 38g and 40f and 42e and 44d, 38h and 40g and 42f and 44e, 40h and 42g and 44f, 42h and 44g


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