I debated buying these for months. I usually wear slipshorts under a dress, but I wanted to wear regular underwear. I got a size M and I wear a 10 pant size. Bought the smooth ones in beige. Absolutely perfect. One warning- I had a dress with a long slit up the right leg, so I figured I'd wear just one Bandelette on my left leg. Big mistake. I still chafed. So you do need to wear both of the pair.