I always wear a size small in fashion nova dresses. Sometimes I get medium if it looks like a really fitted dress. In this case I should have ordered an extra small. I noticed as soon as I took it out of the package it was larger than the typical size small I get from FN. I can already tell the straps won’t be very tight on my shoulders. But I know this dress will still look great, it just won’t be as fitted as I like. I’m 5’9, 140, athletic build, big boobs and slightly larger than average butt. Size down. I hope this review helped!