This is the easiest part of the process — your band size should be fairly stable and straightforward.
1. Measure your band size
Run a tape measure all the way around your body just underneath your breasts and take a measurement in inches.
1. Measure your band size
Make sure the tape measure is horizontal and fairly snug. Your arms should be down. Write down this number.
1. Measure your band size
If this measurement is an odd number, then you should try out bras in both the size below your measurement and the size above.
2. Determine your cup size
Remember, your cup size isn't an absolute measure — it's in proportion to your band size.
2. Determine your cup size
Bend over so that your chest is parallel to the ground. This is so that you'll be measuring all of your breast tissue — not just what protrudes outward when you're standing up.
2. Determine your cup size
Measure around your torso, so that the tape is over the fullest part of your breasts.
2. Determine your cup size
Don't pull the tape too tightly — it should be tight enough that it doesn't evenly move, but not so tight that's pressing into your breast tissue. Write down the number.
2. Determine your cup size
Make sure your tape measure is level to the ground. It shouldn't be a few inches down your back, or you'll end up with an uneven measurement.
2. Determine your cup size
To combat this, try to measure yourself in front of a mirror, or ask your partner or close friend to help you.
2. Determine your cup size
Calculate your cup size. To do this, you'll subtract your band measurement from the cup measurement you just took.
2. Determine your cup size
The difference between the two numbers determines your cup size:
– Less than 1 inch (2.5 cm) = AA
– 1 inch (2.5 cm) = A
– 2 inches (5 cm) = B