They've never been used for performances, only a few classes, when I realized I was not graceful enough to wear pants that were so ample and long. For reference, I am 5'5", 120ish lbs, 30-26-36 with a 30.5" inseam.
Endless Wave Harem Pants - Black Cotton. These are just like the Pants worn by the beautiful Petite Jamilla of the Belly Dance Super Stars! If you have never seen the You Tube video of her dancing in these, you must check it out!