Official chart
Official Aerie size chartBrand sizing guide
Aerie Bra Size Guide
Aerie sizing depends on whether you are shopping a traditional band-and-cup bra, a wireless bra, or an alpha-sized bralette. Use this guide to compare your Wearavo starting size with Aerie's official chart, BFF measuring advice, and style-specific fit notes.
Last updated August 18, 2026. Data checked against Aerie size chart, bra FAQ, and product-page information.
Quick answer
How Aerie bra sizing works
Aerie's bra FAQ explains that bra size starts with two measurements: band size around the ribcage and cup size around the fullest part of the chest. Its official size-chart page separates bras and bralettes, so always check the chart for the exact style.
Band
Aerie says band size is measured around the ribcage, just below the bust.
Cup
Cup size is based on the fullest part of the chest, then compared with your band.
Middle hook
Aerie's bra FAQ says the band should feel secure and even on the middle hook.
Sister size
Aerie's BFF guide points to sister sizes as similar-fit options to try.
Measuring
Aerie BFF measuring method
Aerie's Best Fit Finder guide measures band first just under the bust, then cup around the fullest part of the bust. It also points to sister sizes as nearby options to try when the first size is close but not perfect.
1. Band
Measure snugly under the bust and keep the tape level.
2. Bust
Measure around the fullest part of the chest without pulling tight.
3. Sister size
If the fit is close, try the nearby band/cup option.
Styles
Popular Aerie bra styles by need
Aerie product pages describe SMOOTHEZ Full Coverage as lightly lined with flexible underwire, high support, and most coverage. The SMOOTHEZ Bra-ish wireless bralette is described with medium support, stretch, and D/DD cup options available.
SMOOTHEZ Full Coverage
A smoother everyday bra when you want more cup coverage and stronger support.
SMOOTHEZ Bra-ish
A wireless hybrid bralette when you want stretch, medium support, and a smooth neckline.
Sunnie Wireless
A softer everyday option when you want light lining without underwire.
Sunnie Demi
A T-shirt-style shape when you want lift and a smoother look under fitted tops.
Fit checks
How to tell if an Aerie bra fits
- The band feels secure and level on the middle hook.
- The cups sit smoothly without cutting in or leaving large gaps.
- The straps stay put without doing all the support work.
- The center and underwire area feel comfortable when you move.
Compare
Use your Wearavo result inside Aerie
Start with your calculated band and cup. If an Aerie product uses alpha sizing, compare the product's Size Details against your closest band/cup size rather than assuming every bralette uses the same fit.
Shop carefully
Shop Aerie after checking the exact size details
Aerie styles can move between band/cup sizing and alpha bralette sizing. Confirm the size chart and product fit details before ordering. Affiliate links may earn a commission at no extra cost to you.
FAQ
Does Aerie have a bra size chart?
Yes. Aerie publishes women's size charts with separate sections for bras and bralettes. Use the chart for the specific style because wireless bralettes and band-and-cup bras can size differently.
How does Aerie say to measure bra size?
Aerie explains bra sizing with two measurements: band size around the ribcage and cup size around the fullest part of the chest. Its BFF guide uses band first, then bust, then sister size.
Does Aerie run true to size?
Aerie fit depends on the style and fabric. SMOOTHEZ styles are often described as soft, stretchy, and smooth, while Sunnie and underwire styles may feel more structured.
What is Aerie SMOOTHEZ best for?
SMOOTHEZ is positioned as a smooth, soft everyday layer. Choose full coverage for more cup coverage and Bra-ish wireless when you want a bralette-like feel.
Should I use a sister size in Aerie bras?
Use a sister size when the cup volume feels close but the band is too tight or too loose. Aerie's BFF guide also points shoppers toward sister sizes as similar-fit options.
Should I use Wearavo before shopping Aerie?
Yes. Use Wearavo to get a starting size, then compare it with Aerie's official chart and the exact product's size details before ordering.
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