“I'm so wary of anything billed as "OS" aka One Size fits all when we all know good and well that's so not true. Here we have OS and OS-Queen. I'm 5'7", 150lbs with a pretty average build which includes non-model thighs. According to the size on the package, the OS will fit me and - yes - it does. But the thing is if you want it more comfortable and less tight around your mid/upper thigh (where things tend to get a little thicker), go for the OS-Queen. They look and fit just like the OS but the thigh band is just THAT MUCH more comfy with less of your thigh trying to escape over the top:).”