The dress size is an illusion created by makers of the clothes. For example, I am either a size 0.2,4 or 6 depending on the maker of the label. It does not make sense at all. I weigh the same and measure the same as I did when I was 1618 years old. My advice is don't pay attention to the size. Someone who loves you will not care which size you wear. Perhaps they would only when they want to buy you something, in which case, a clothing is a very personal gift and reserved only for the ones you are closest to, and they would know what you wear.