I love the effect of the pants, but the sizing seems very wrong to me. On the chart, I clearly fall into the "small" category, but I ordered "medium" just to be safe since I have long legs. Unfortunately, the pants are STILL too small. The length from the knee to the crotch is just too short, so at the beginning of every run, I find myself pulling the material up (at the thigh) over and over because the pants slide downward toward my knees. As I sweat a little, the pants stop sliding down me leg. But be aware before you pull that (nearly) $100 price tag off the pants that you may want to try them on and then return them for a larger size.