Grab a tape measure & notepad and write down these measurements. It is best NOT to wear a bra when taking these measurements.
A: SNUG UNDERBUST MEASUREMENT While holding a tape measure parallel to the floor, measure your rib cage right under where breast tissue begins. The tape measure should be snug but not cutting into your skin.
B: TIGHT UNDERBUST MEASUREMENT Measure this area again, but this time pulling as tight as possible.
C: BUST MEASUREMENT STANDING Loosely measure the fullest part of your bust while standing, being sure to keep the tape measure parallel to the floor.
D: BUST MEASUREMENT LEANING Loosely measure the fullest part of your bust while leaning over with your back parallel to the floor.
RECORD YOUR BAND SIZE Take Measurement A from above, rounding to the nearest whole number (29.25" would round to 30"). This is your band size!
DETERMINE YOUR CUP SIZE: Subtract C from D
YOUR BRA SIZE IS ... We have already determined band size as measurement A.
If E - A = 6, then your bra size would be 30E.