Oh my!  I bought 2 pairs of yoga pants, one was the black with the purple stripes and one is the orange/peach one.  They do not have the same waist style at all.  The black pair has a thick elastic band that cannot be folded over, the orange ones will go all the way up over my stomach and are able to fold down.  The quality of the material is also not the same, the black is thin without a lot of give whereas the orange is thicker with more give.  The orange pair fits as I would expect but the black pair is way too small.  I wear a size 8 normally but the black pants for 8-10 hardly got past my calves.

I will be keeping the orange pair, returning the black.

Since the sizing is so irregular, I cannot give it more than 1 star.  Had I only received the orange pants I would have given them 5 but inconsistency is not acceptable and the better pants should not average out their poor quality control.