The Lush jacket runs small - or at least slim. I wear small sized tops (and sport some D cups), and the small Lush jacket was too tight. It wasn't just the girlz that were uncomfortable, either - my shoulders were too broad and arms too big. Ultimately, a medium would have fit me (I tried these on in the store last season). As far as the pants go, I wear a size 8 or so on the bottom, and my Lush pants are a small. My experience with Burton pants is that they run a bit large in the waist. If it'll help you... I'm 5'3 and weigh 135lbs. I usually wear either a 6 or 8 in jeans and a medium or small on top.