These are so great. I ordered a size up based on some other reviews and they fit perfectly. I don't know why I waited so long to get them, they're so much more comfortable and better fitting than my regular underwear I've been stretching out the past couple months. Pre-pregnancy size was 4-6 but I've definitely gained more weight this time on my second pregnancy...I'm 33 weeks and up to about 165 pounds and ordered a large. They fit great!