I read product reviews prior to purchasing these pants, and most reviewers urged sizing up.  So I did.  The size small in these pants are swimmingly large, and because the waistline has no drawstring and the pant fabric is slippery, I am constantly pulling them up in class.  Another classmate has the same problem.  We joke about the need for Zumba-branded suspenders.  If I had known to buy these pants true to size (as I did for the black cargo capris--I bought these in xs and they fit perfectly), they would have scored higher.  For your information, I am 5'3" and 110 lb and take a size 4 in Lululemon workout gear.  Hope this helps someone!