Size Guide
34B Bra Size
Everything you need to know about bra size 34B — measurements, sister sizes, international equivalents, and fit advice.
Measurements for 34B
Underbust (Band)
33 to 35 inches (84 to 89 cm)
Full Bust
approximately 37 inches (94 cm)
34B in Other Sizing Systems
US
34B
UK
34B
EU
75B
FR
90B
AU
12B
Sister Sizes for 34B
These sizes have the same cup volume as 34B. Try them if the band feels too tight or too loose.
32C ↔ 34B ↔ 36A
← Tighter band, bigger cup · Looser band, smaller cup →
Fit Tips for 34B
B cups are among the most widely available sizes. If gapping occurs, try a demi-cup or push-up style.
If your 34B 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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