Also a good bra size calculator from this website http://www.ewa-michalak.pl/Size-Calculator-chelp-eng-10.html except you will have to measure in centimeters but it is pretty accurate. The company also carries all size ranges for a more custom made fit. The downside is that they are in Poland so shipping does take a little bit longer but if they carry your size it is worth the wait! Anyways here is the video: http://vimeo.com/30552480
Notice the model bends over to get the full bust measurement, it is the best way to measure if you want the cup to fit and cover all the breast tissue like it is supposed to.