I like Commando and Oroblu. I am fair though not sure I'm pale, as I know paler people. I am 5'0 but haven't seen 100 lbs in awhile. I've worn these since I weighed 107 lbs but I'm not that now as I've gained. The same SM/Medium is still fitting just fine.
I like Oroblu brand because of the waist band -- it doesn't dig uncomfortably into my apple belly nor does it do that "window shade effect" thing where it rolls down. I don't know how you are built, you may not like how high up the waist they go. I love that about them, and that they stay up, but I am high waisted.
I would say it is worth a try. They last forever. I just replenished in the Fall, but my initial pairs still are going strong, no rips, no tears.