i measured my bust (40") and ribcage (32") and ordered accordingly - a luxe. it fit well around the ribage but the cup fabric didn't even come CLOSE to covering my breast tissue. i ended up giving it to my (much smaller) sister and it fit her fine. my sister later found the cup-based fit chart (i never could find one and still can't...all i have is the screenshot she took) and i discovered that my 34G/H should have been at least a 2 luxe. my only guess is that because my breasts aren't super perky, the bust measurement didn't adequately account for how big they actually are. pretty disappointing for me - but at least my sister is happy with her new bra!