I am 19 weeks pregnant and have been having an issue of my thighs rubbing for the first time ever.  I've tried a few things to prevent it but nothing worked.  I found these online and they looked promising.  I tried them excitedly when they arrived and they worked well while i was home.  Then i wore them to the gym, and it was a different story.  They got rolled up into a little wad under my pants in less than 15 minutes of me being there- amd I was only walking around.  I tried to straighten them bank out but ended up having go to the bathroom and take them off. I may have gotten the wing size but, I measured my thighs 2x before ordering. Unless they grew dramatically during that week, I'm not sure what happened. If your not very active, they'd probably work great.