Ok, this has been bugging me for awhile This is the type of chart I've always seen that is supposed to tell you your bra size: To find out your body size, wrap a measuring tape around your diaphragm while wearing a bra. Add five inches to this measurement to find out your total body size. If it's an uneven number, round up. Then place a measuring tape around the fullest part of your bust. The difference between this measurement and your total body size decides your cup size. Here's how to calculate. * If your bust measurement is up to an inch larger than your body size, your cup size is A. * If your bust measurement is up to 2 inches larger than your body size, you're a B. * Three inches larger, you're a C. * Four inches larger is a D. * Five inches larger is a DD. * Six inches larger is a DDD. Now, when I do this to myself it says I should wear a 30B - is this even a real size? Also what about models, whose measurements are usually 33-23-33 or 34-24-34? If you add about 2 inches to the waist for the rib cage a 33-23 model would wear a bra size 30C and a 34-24 model would wear a 32B? Am I just confused or do these charts just not work?