Size Guide
40DDD Bra Size
Everything you need to know about bra size 40DDD — measurements, sister sizes, international equivalents, and fit advice.
Measurements for 40DDD
Underbust (Band)
39 to 41 inches (99 to 104 cm)
Full Bust
approximately 47 inches (119 cm)
40DDD in Other Sizing Systems
US
40DDD/F
UK
40E
EU
90F
FR
105F
AU
18E
Sister Sizes for 40DDD
These sizes have the same cup volume as 40DDD. Try them if the band feels too tight or too loose.
38F ↔ 40DDD ↔ 42DD
← Tighter band, bigger cup · Looser band, smaller cup →
Fit Tips for 40DDD
DDD/F cups benefit from full-coverage styles and three-part cups that offer structure. Side support panels are helpful.
If your 40DDD 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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