I have to admit that my expectations for these tights were very low.  I bought the purple and black striped ones for a Halloween costume and was afraid to try them on beforehand because I was afraid they would run on first wearing, and I also expected them to be too short or too tight in spite of the 3X-4X sizing.  So I was pleasantly surprised when they actually fit!  The crotch was a bit low (the reason they get only 4 stars) but I do have long legs for my 5'6" height.  I solved part of that problem by wearing a pair of shorts under my skirt, which helped to keep them up.  The outside temperature had also suddenly dropped (the main reason for the shorts, I was going to be outside for hours) and the tights were warm and comfortable on my legs.  The fabric content is 60% polyester, only 40% nylon, so they were softer and more durable than 100% nylon.  I was so pleased that I decided I had to post a review on Amazon.  As another reviewer stated, different sellers have listed these in different ways.  The ones that I bought were by Leg Avenue and the size was 3X-4X. I also liked the color, since they went perfectly with the purple and black in the rest of my witch costume.  The low crotch will probably keep me from using them for everyday wear, but they were perfect for my purpose.