ANSWER: Length is what most women struggle with when it comes to skirts. The most flattering length is at the bend of your knee (knee pit)…a little longer and your leg can look heavy, and a little shorter can look inappropriate.
Also, a-line skirts are a universally flattering style. Since the goal is to create an hourglass (or "X") shape, with the a-line skirt you have the bottom half of the hourglass done with the skirt.
(style note: this skirt I found is from Macy's, isn't it adorable?)