Being sold as a lot. I purchased these for use after a surgery several years back and laundered/cut the tags off the before trying one on & determining that they did not fit me. These were not tried on and have been in storage since I could not return them. I am not sure what the difference is between Speax & Thinx, but they are all the same size and look identical aside from the Speax being tagless and the Thinx may have a slightly wider waistband. They are both from the same company. Size-wise they would be appropriate if you wear a size 16 pants. I wore a 14 at the time and they were not a snug enough fit for me. Smoke free home.