This was a true medium for me, and it had some give to the material. I am 5' 9" and 155 lbs. and the medium fit well but did ride up a bit as the day went on (sizing up may prevent that). This is not fitted past the hip, so if you are wearing a figure hugging dress, this will bunch underneath it; however, this worked perfectly for under a flowy maxi skirt. The lace on the top is very smooth, so I don't think it would show through. I'm very happy with this purchase.