PIN THIS NOW AND GO MEASURE YOURSELF LADIES!!! Pinner said: This is ridiculous! according to the chart I've been wear two sizes too big in the band and three sizes too small in the cup. It also explains my "armpit fat"--DOOO IIIIIT!!! EPBOT: Everything You Never Knew You Needed To Know About Bras. Great blog post about proper bra sizing and everything you never knew you didn't know.