Popana is a great summer layering cardigan. It drapes well & looks slimming. I have purchased several colors in the Popana brand. However, it does not cover the backside, in case thats what you're looking for. Im 53 & 130 lbs & have both the small & medium. The medium is a little looser but both fit fine.  If what you're wanting is backside coverage, then I would highly recommend the B.I.L.Y. brand. That brand drapes well too with a slimming look, plus it covers the backside. The small size B.I.L.Y fits my shape better, medium is a little too big. I have some of the B.I.L.Y with pockets too.  I almost feel like an expert with these summer layering cardigans, because over the last couple of years Ive ordered so many different brands, but have finally settled on these two. Hope this is helpful.