HerRoom Response: Many brands have different ways of naming their cup sizes. For example, if you are an I cup in Elomi, an I cup in Elila is 5 cup sizes smaller. We have a great chart that helps you find your correct size among different brand. Here is the link: http://www.herroom.com/full-figure-bra-cup-sizing,905,30.html Teresa from Winston-Salem, North Carolina/USA