Ok, I'm going to ask a really stupid question.  Is size 8 a small fat?  I've seen the vanity sizing which is nuts, but a true size 8 means what?  I know I'm woefully ignorant, but...i thought small fat was around 170... What Is a Size 8?  First, you need to know the statistics to aim for. According to   the Official U.S Misses chart,  a size 8 is a "medium size". The   standard measurements for a size 8 are bust, 35.5”-36”,   waist, 27.5”-28”, and  hips, 37.5” -38.5”. The waist may seem a bit big, but if she's 5'11 (my current), it works.  BTW, she's 152.