Size Guide
40C Bra Size
Everything you need to know about bra size 40C — measurements, sister sizes, international equivalents, and fit advice.
Measurements for 40C
Underbust (Band)
39 to 41 inches (99 to 104 cm)
Full Bust
approximately 44 inches (112 cm)
40C in Other Sizing Systems
US
40C
UK
40C
EU
90C
FR
105C
AU
18C
Sister Sizes for 40C
These sizes have the same cup volume as 40C. Try them if the band feels too tight or too loose.
38D ↔ 40C ↔ 42B
← Tighter band, bigger cup · Looser band, smaller cup →
Fit Tips for 40C
C cups work well in most bra styles. If you experience spillover in one brand but not another, cup shapes vary — try different styles.
If your 40C 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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