If you're like many women, finding a bra that fits may seem an impossible task. Fortunately, a good-fitting brassiere is possible. Here's a classic formula for finding your best fit.
Use a measuring tape -- the kind found in a sewing kit, not the type buried in a tool box.
Enlist help. Your measurements will be more accurate if someone else takes them. If that's not possible, begin by facing a full length mirror.
Measuring against bare skin will give you the most accurate results. If someone else is taking your numbers and you're feeling shy, don a tight-fitting seamless T-shirt over bare breasts.
There are two elements to your bra size; the band size (i.e. 32, 34, 36) and cup size (ie. A, B, C). Start with band size, also called frame size: Wrap the measuring tape tightly around your rib cage, just below your bust. Add 5 inches to the measurement. Thus, a rib cage measurement of 27" + 5" would equal a 32" band size.
Find your cup size: Measure loosely around the fullest part of your bust. Subtract your band size from this measurement. A difference of 1"=A cup, 2"=B cup, 3"=C cup, 4"=D cup. For example, a cup measurement of 34" - 32" band size equals 2", or a B cup.
Be prepared to re-measure every few years. Breasts change size with time, which is why bra-fitting experts recommend re-evaluating your measurements at least once every two years -- more often if you've lost or gained a significant amount of weight or had a baby.

You wear it well

Knowing your bra size is important, but so is knowing exactly how a bra is supposed to fit.
Cups: The cups should be filled out so they fit smoothly. If there are wrinkles, you may need a smaller cup size. In the case of cotton/spandex underwire bras, there should be a little excess fabric in the cups to allow for shrinkage. If there is overflow at the top, under the arms, you should try a larger cup size.
Security: Your breasts should be held snugly in place, even when you lift your arms, bend over, run or jump.
Band: The band should be fitted, but not cutting into your skin. It should sit lower on the back than in the front and sit comfortably below the shoulder blades. The back of the bra should not ride up above the bra line. If it does, adjust the straps. If the bra still rides up, try a smaller band size.

Page:

1

2

3