I'm having the hardest time finding working "leggings."  I'm tall and plus sized, and although I'm able to find plus sized workout pants, not many manufacturers make plus-size TALL workout pants, and the very few that do, don't have a long-enough inseam.

Decided to search for plus-size leggings and that's an even harder task; these however, were the best I've found so far.  Unfortunately they run small, or rather they run TIGHT.  Additionally, I have large thighs, and they make a loud "sweeping" sound when I walk.  I ultimately returned them for that reason.