This is a great set, and I see it receiving heavy rotation in my closet this fall and winter. I was skeptical of the one-size-fits-all sizing, but all I can tell you is it fits me well. I'm 5'4" - 125 lbs. The sweater definitely has plenty of room to spare. If I leave it hanging down, it looks very boxy. I prefer it with a little front tuck on myself. The skirt fits great. It doesn't feel loose at all, but it is very stretchy, so I could see it fitting size medium or large also. I like the sweater with jeans as well. I haven't tried the skirt with something else yet. I'm super happy with this fun 2-piece sweater set.