I paid attention to the other reviewers about the need to order up a size or 2 for these.  I am glad I did.  I ordered in XL when I usually wear panties sized medium.  These fit great and the natural lifting effect is great!  I couldn't see a line anywhere no matter what sort of clothing I put on.  If these were available in different colors (I hate white!) I would buy them in every color!  You will not be disappointed!