what does sister bra size mean?
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Sister sizes are groups of bra-size equivalents that are related by cup volume. For example, a 36F (DDD) cup belongs to the same family as a 38E, a 40D, and a 42C.
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If your bust size is less than 1 inch bigger than your band size, you're a cup size AA. 1-inch difference = A. 2-inch difference = B. 3-inch difference = C.
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For example, if you're current bra is a 34C and your underbust (see Step 1, above) measures 31 inches, then you probably need a 32D. On a 30-inch band, this would be a 30DD. And remember: In the U.K., cup sizes are AA, A, B, C, D, DD, E, F, FF, G, GG, H, HH, J, JJ, K, KK.
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usually the difference is around 1 inch but most bras of today, will stretch a little, so you could fit comfortably into a B if your a C. ... The 32 measurement is the band size of the bra and B and C measurements are the cup size. So both of these bra sizes are the same band size but the c cup would be 1 inch larger.
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If your bust size is less than 1 inch bigger than your band size, you're a cup size AA. 1-inch difference = A. 2-inch difference = B. ... 4-inch difference = D.
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Bra size has two measurements; the band (rib cage) and the cup (bust). Cup size does not represent breast size but instead represents the difference between the rib cage and the bust.
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Each inch represents a cup size. For example, if your band measurement is 34 inches and your cup measurement is 35 inches, the difference is one inch, and your cup size is A. If your band measurement is 34 inches and your bust measurement is 37 inches, the difference is three inches, and your cup size is C.
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Bra cup size is the measurement of full bust size, so C cup is 3 inches bigger than band size.
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Bras are measure in cups so that a bra which is a “34C” has a chest band of 34 inches, and a “cup” size of C. Shoulder straps can be adjusted to fit each woman wearing them and can hold the cups at the correct height. That is why bras are measured in cups, to give the approximate average breast sizes for most women.
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However, a C cup is the perfect size, according to a recent survey. However the average bra size is a 36DD today, up from a 34B in the 60s. A C cup is also the most frequently asked for size among patients, one doctor revealed.
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The 4 inch difference in the two measurements is a D cup. And so on. ... A breast measurement 5 inches larger than the band size is a DD and a breast measurement 6 inches larger than the band size is a DDD. Some European brands do have E and F cups.
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A G cup bra size in the US is equivalent to an F cup size in the UK. ... Sister sizes have the same cup volume, but their band sizes are different.
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To further confuse things, in standard U.S. sizing there are no E or F cups. A breast measurement 5 inches larger than the band size is a DD and a breast measurement 6 inches larger than the band size is a DDD. Some European brands do have E and F cups.
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Smallest band size in bra is usually 28 or 30 depending on our region (US/UK/Europe) and normal smaller cup size available in market are “A”, but in few regions you may get smallest cup size of “AA” or even “AAA” which are sub 1-inch size cup.
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Bust size—the circumference measured around the chest over the fullest part of the breasts, while wearing a properly fitted bra. Waist size—the smallest circumference measured around the natural waist, just above the belly button.
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Bra sizes as we generally know come in two types, one of which is alphanumeric like 32B, 36D, 34C and the other in sizes like S, M, L, XL and so on. The latter style of sizing varies from brand to brand of bra manufacturers and is purely dependent on their own requirement.
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The band around your ribs is your bra size (e.g. 32, 34) and the part that fits around the bust is your cup size (A, B, C etc). If your bra size (the band around your ribs) is 31", add 5" = 36", and your cup measurement is 36", your bra size will be 36A.