You shouldn’t be surprised if we tell you that you can fit into more than one specific bra size. Sister sizes are alternative sizes that will fit you perfectly. It is important to understand the difference between regular bra size and sister size before you opt for one.
The hidden secret to sister bra sizes is the fact that you will realize that you can actually fit into more bra sizes than your current bra size.
How the Concept of Sister Bra Size Works?
We usually buy a Bra by opting for the right cup and band size. What you don’t know is that there is a relation between the two.
Fact: Bra Cup size (cup volume) is relative to the Bra Band Size. So when your band size increases say for example from 32B to 34B, the cup volume gets larger. For more interesting facts, read bra facts.
Based on this concept you will find that more cup sizes have a similar volume even though they do not share the same band size. Bra sizes with the same Bra Cup volume, although labeled with varying cup sizes are termed as Bra Sisters Sizes.
How Do You Find Your Sister Bra Size?
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You can refer to size charts that will help you determine your Sister Bra Sizes. The sizes in the same color or the same row are all sister Sizes. They have the same cup volume as your bra size.
For example, if you wear a regular 34 C, then your bust may also fit into a 32D or even a 36 B sized bra.
Figuring out a Sister Size requires a set of one-size shifts, in opposite directions, in the numbers and letters of bra sizing.
Remember that the cup changes in “name” only; the band’s number size and actual length changes.
• Sister Size DOWN = one actual size smaller than your current Band size AND one letter name larger than your current Cup
• Sister Size UP = one actual size larger than your current Band size AND one letter name smaller than your current Cup
Let Me Give You an Example with Different Instances
1) If the Band Fits, but the Cup Doesn’t
Solution: Change the letter but not the number
Example: If your size is currently 34B then you might want to go to 34A or 34C depending on whether you need a bigger or smaller cup.
2) If the Band Doesn’t Fit but the Cup Fits
Solution: Change both the letter and the number diagonally
Example: If your size is currently 34B and the band is loose but the cup is correct you need to go to 32C to make the band tighter and make the cup remain unchanged.
Similarly, if you are a size34B and the band is tight then you need to go up a band size and go down a cup size as the cup size remains unchanged.
3) If Both the Cup and Band Size Need Adjustment
Solution: You need to adjust the number but not the letter
Example: If your current size is 34B and both band and cup are too loose then you need to go to 32B. The cup size remains unchanged as when we go down band size the cup automatically reduces in volume.
Similarly if band size and cup size is too tight then you need to go up a band size without changing the cup size. The cup size remains unchanged as when we go up band size the cup automatically increases in volume
In short : Many bra sizes can fit your bust! See which bra sizes that have same cup volume in the bra sister size chart.
Remember : Different “bra sister sizes” can be used by the same woman (cup volume will fit). But it is no guarantee that all band sizes will fit. So remember to always try bras on!
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