Size Guide
40AA Bra Size
Everything you need to know about bra size 40AA — measurements, sister sizes, international equivalents, and fit advice.
Measurements for 40AA
Underbust (Band)
39 to 41 inches (99 to 104 cm)
Full Bust
approximately 41 inches (104 cm)
40AA in Other Sizing Systems
US
40AA
UK
40AA
EU
90AA
FR
105AA
AU
18AA
Sister Sizes for 40AA
These sizes have the same cup volume as 40AA. Try them if the band feels too tight or too loose.
38A ↔ 40AA
← Tighter band, bigger cup · Looser band, smaller cup →
Fit Tips for 40AA
AA cups can be hard to find in stores. Look for brands specializing in petite sizing like The Little Bra Company.
If your 40AA bra is gapping at the top of the cup, the cup may be too large or the wrong shape — try a demi-cup or balconette. If the center gore doesn't sit flat, go up one cup size.
Not sure about your size? Measure yourself and double-check.
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