Answer (1 of 14): The number is the distance around your rib cage, which is the length of the bra strap. The cup size is the part that actially covers the breast. So being a B cup, you would not be considered big.
What is the cup size of a medium bra? - Quora
Is 38 B breast size big? - Quora
KYMRON Mini Excavator RH14G Vs RH14-3 Comparison, 40% OFF
Is 36B an average bra size for a 21-year-old? - Quora
Which is a bigger cup size bra, C or D? - Quora
KYMRON Mini Excavator RH14G Vs RH14-3 Comparison, 40% OFF
Is 38 B breast size big? - Quora
What's your bra size? - Quora
What kind of bra is recommended for bigger-breasted young girls double Ds? - Quora
KYMRON Mini Excavator RH14G Vs RH14-3 Comparison, 40% OFF
What bra size did you wear at 12 years old? Is a 32B big or a small for a 12-year-old? - Quora
What's your bra size? - Quora
Is a size 38B bra too big? - Quora
