I have never purchased Spanx before and was pointed to an online purchase from a coworker who felt the prices were better here than at stores. I was confused by the sizing chart and found I was right in the middle of some of the letters offered. I chose wrong, apparently, because when I was finally able to use them (about three weeks after ordering) I found I couldn't even get them past my thighs (and I'm not that big!). I know these are supposed to be tight, but when I honestly couldn't pull any more I took them off and threw them away. I didn't even bother trying to send them back because so much time had passed from my receiving them to trying them on. In the end the product itself I'm sure would have worked great, had they fit, but I wish they would create an easier sizing chart to follow. Plus I had noticed when I put them on that there would have been a VERY visible line at the mid-thighs when worn with pants of any kind. As someone who doesn't always wear dresses I thought this was a minus too, since it woule be nice to have the slimming look with jeans or leggings.