How to Measure Your Bra Size Modern Sizing

1. Measure your band size

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

2. Determine your cup size

– 3 inches (7.5 cm) = C – 4 inches (10 cm) = D – 5 inches (12.5 cm) = DD

2. Determine your cup size

– 6 inches (15 cm) = DDD – 7 inches (18 cm) = DDDD/F

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