Size Guide
40G Bra Size
Everything you need to know about bra size 40G — measurements, sister sizes, international equivalents, and fit advice.
Measurements for 40G
Underbust (Band)
39 to 41 inches (99 to 104 cm)
Full Bust
approximately 48 inches (122 cm)
40G in Other Sizing Systems
US
40G
UK
40F
EU
90G
FR
105G
AU
18F
Sister Sizes for 40G
These sizes have the same cup volume as 40G. Try them if the band feels too tight or too loose.
38G ↔ 40F ↔ 42DDD
← Tighter band, bigger cup · Looser band, smaller cup →
Fit Tips for 40G
G cups require well-engineered bras. Look for brands like Panache, Elomi, or Freya that specialize in fuller bust support.
If your 40G 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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