I am 5'9" 125 lbs 29 inch waist. I used the size chart and ordered a Medium. The waist is a bit too big. It's not too noticeable since I tuck in the shirts with this particular skirt which fills in the gaps. I'm pretty sure I would have fit in a small though. The skirt fits an inch below the knee which is rare considering my height. The material has a bit of sheen to it. The skirt is lined and does not need a slip.  The pleats give the skirt some volume. I sometimes wear a petty coat when I'm looking for more drama. I'm very happy with it!