#AskJenny Question of the Week: What Are Sister Sizes?

So we all know our bra size…but what is a sister size, anyway? Our fit and style expert, Jenny Altman, is here to explain the ins and outs of sister sizing for the confused among us.

Below, watch Jenny’s quick explanation of a sister size, and read on for even more info on whether a sister size could be a good option for you!

 

Q: What’s the difference between my bra size and my sister size? And will it work for me?

A: You’ve all probably heard sales associates mention “sister size” when it comes to bra size. A sister size is really just one size up or down from the size you normally wear. An associate may suggest trying a sister size if you’re spilling out or not fully filling out a particular style, or if they don’t have your size in stock.

Sometimes wearing a sister size works flawlessly, other times it does not work as well. It all depends on two factors: how “full” of a cup size you are, and the style of the bra. You really just have to try on different styles and sizes to see what will work best for you!

For example, let’s say you are a 32C.

If you are a more shallow C, sizing down a cup size and up a band size (34B) can work well, especially in a full coverage bra style like the Sofie or the Sunnie. Just keep in mind that wearing a larger band size will offer less support, because your bra’s support should always come from the band, not the straps!

If you ARE a full C cup, you could consider sizing up a cup size and down a band size (30D). Trying your larger sister size may work best in a cup with less coverage, like a demi cup style (I love the Ella Gel or the Blakely!).

If you are, however, a “full” C, and your band and cup size work for you in most every bra, then sizing into the sister size is usually not your best option. You already know you need that C, so try to stick with it when possible.

The sister size is really just a way of saying, “hey, even though you normally wear a size 4 jeans, the super skinny style in size 6 will probably work, just as a boyfriend jean in a size 2 would”. Try your actual size and try the sister size in the styles you like, then you see which one best fits your cup as well as your band size. If you aren’t sure, ask one of our Aerie bra fit experts for their opinion!

That’s all for today! Don’t forget – if you have fit and style questions for Jenny, email them to AskJenny@ae.com, or tweet @Aerie with #AskJenny! She’ll be answering your questions weekly on the blog. Our most recent post? All about Multi-Way Bras that do it all!

Xoxo,

Aerie

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