Look at the garment measurements on the website (Pull up the individual item and scroll to the bottom of the comments and click where indicated for garment measurements), take your own measurements, give yourself a little wiggle room. If it doesn't work you can always exchange for a different size. If the item is going quickly and will probably sell out then you can do what I do and order two sizes and return the one that does not work, This will cost you return postage, but if you really want the item it is worth it. Once you determine your QVC size, you will find that most of the vendors conform to the sizing. I would still check measurements on the garments until you get a feel for each vendor. Hope this helps