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If I work on my pecs will my bra size change?
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Dr. Alexander Nein
Surgery - Plastics
In brief: Porbably not
Bra cup size is determined by actual breast size while the band number comes from the chest circumference.
Pec exercises will not increase breast size although there might be a mild increase in chest circumference from increasing muscle mass. Women will, however, have difficulty really increasing muscle mass significantly because of relatively lower levels of testosterone.

In brief: Porbably not
Bra cup size is determined by actual breast size while the band number comes from the chest circumference.
Pec exercises will not increase breast size although there might be a mild increase in chest circumference from increasing muscle mass. Women will, however, have difficulty really increasing muscle mass significantly because of relatively lower levels of testosterone.
Dr. Alexander Nein
Dr. Alexander Nein
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