What is a Sister Size?

The Sisterhood of the Bras. It’s Time to Know Yours.

Finding a well-fitting bra can sometimes seem like a tough task, the struggle is real - whether you're trying a new style, experimenting with something risky or just getting yourself some new bras. While knowing your correct size is essential for the perfect fit, understanding your breasts and what makes you feel comfortable is important too. 

Understanding Sister Sizes is something every girl should know, because you never know when it comes handy, like - a pretty design ran out of your cup size, your current bra just doesn't sit right, or a slight variation in your cup size isn't getting you the perfect fit.  

What is a Sister Size? 

Sister Sizing is based on similar cup and band sizes that end up giving you the same fit as your current bra size with subtle differences. The final fit is perfect for your body’s shape and gives you comfort. 

You have a basic understanding of bra sizes by now, they are basically ratios - band: bust. The easiest way to understand is - as cup size goes up, the band’s width must come down to maintain the ratio of the cup size. As the band size increases around the rib cage, the cup size should decrease. 

How do you Calculate your Sister Size? 

Now, here’s the fun part. Sister sizing takes a 32C and makes it equivalent to a 34B and a 30D too! This gives you so much more scope to explore the world of lingerie styles, sizes and more. 

Sister Sizes usually run in opposite directions with one-size shifts. Confused? Don’t worry, we’re here to help. 

Sizing Down: One size smaller than your current band size and one letter (A, B, C, D) larger than your current cup size. Eg: If you wear a 36C, your sister size down will be 34D.

Sizing Up: One size larger than your current band size and one letter (A, B, C, D) smaller than your current cup size. Eg: If you wear a 32C, your sister size up will be 34B.

Wondering Whether to Size Up or Down? We’ll Tell You. 

Which hook do you wear your bra on? 

    If your answer is “the tightest hook,” sizing down might work.

    If your answer is “the loosest hook,” then you could try sizing up! 

    If your answer is “the hook in the middle” then you could try either going up or down! 

You’ve got all the information you need. Now find your sister sizes in the amanté Bra Sister Size Chart below. 

Amanté Sister Size Chart

Sister Size Chart

The chart takes away all confusion as you notice the on-size shifts in diagonal directions. As you can see in the chart above, a 32C can also be a 34B | 36C also works as a 32DD and vice versa. 

The next time your favorite brand runs out of a pretty design or your bra just doesn't feel right, you’ll know what to do. Also, remember to keep the amanté Bra Sister Size Chart handy as the sizes follow a global standard. 

That said, even though sister sizing is usually accurate, there are chances that you may find exceptions. The best option to get the best fitting bra is to find your perfect fit

Shop Bra by Sizes:

32B Size Bra | 32C Size Bra | 32D Size Bra | 34B Size Bra |  34C Size Bra | 34D Size Bra | 36B Size Bra | 36C Size Bra | 36D Size Bra | 38B Size Bra | 38C Size Bra | 38D Size Bra | 40C Size Bra | 40D Size Bra |

Check out our other blogs:

What is the Difference Between a Bra and a Bralette?
Bras for Teenagers
Types of Bra


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