So I got this bra in a 30B and C to see which fit better. The 30C definitely fits better in the cup (gore tacks, doesn't in 30B), but the style is still problematic for my shallow shape. The cup is nice and wide and the spacing is great for me. Even though it's fairly low cut, the cup curves in at the top creating minor quadboob on my larger side and a bizarrely abrupt curved-to-straight silhouette on my smaller side. I do actually fill both cups out completely (no empty space under the sharp curve at the top), probably because they are lined, ... low cut and may run small.
The top being so curved/closed is definitely the issue. I confirmed this by trying it with the crossback option. Having the straps pull in diagonally opens up the top of the cup more and gives me a much more natural silhouette on the smaller and larger side (see pics). For reference, my underbust measures about 27.5-28 and this fits best on the tightest hook. Left perimeter is .5 larger than right, meaning a whole cup size difference between them https://d28qt14g3opchh.cloudfront.net/smileys/icon_sad.gif" alt=":(" />. I'm including this note and pics of both sides to illustrate the difference between them since I think Aerie cups may run a bit small (from this experience and from reading user reviews on this site and theirs). I think that in most companies my left side is a 30C and my right is a 30B. Though the 30C fits pretty well, I think that in Aerie I might actually be a 30D/30C, which would confirm the previous statement. The upside to all this is that I'm kinda like two reviewers in one haha
Not sure that I'll be keeping it since I wear a lot of tank tops, most of which are not racerbacks. And honestly I find putting on/taking off crossback straps to be pretty annoying. But I do like some things about it (please see 30B review for notes on comfort etc) so we'll see.
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Updated on Jan 07, 2015 Flag this
The Aerie Hannah does not run too small in total volume, although it is probably too small for you. The Hannah, along with the Blakely and the Bridget, were made for non-tall rooted types. Therefore, even if you sized up to a 30D, you still run the risk of quadding.
Like I stated in the fit request, the Sunnie and the Sunnie Push-up are the only two Aerie 30-band styles that have more space in the top parts of the cups. Even with those two styles, you might find that 30D fits you better.