I purchased this in Nude color to wear under a little white dress I got recently.  The material is soft lycra/cotton/spandex mix. It truly is a one size and I think would fit a small person or even an XL or XXL.  I'm in the middle and it was fine. It has good color coverage and seems to keep everything smoother/smoothish - although without being restrictive the way other name brand sucker-inners are made to. I would consider this a great tight slip to wear under something. It isn't sheer, but you could definitely see my dark colored undies through it, so you couldn't wear it by itself in public - but it covered well despite this.  Because it is stretchy, i think you can make this longer or shorter depending on the length of your dress your discression. I'm happy with this.  And because it is nude I could literally wear this under anything I wanted to.  And the price was more reasonable than most slips I looked at on line.  No regrets. Get this if you aren't sure. You can find something to wear it under.