A-Line skirt on a flat yoke is a great way to wear a skirt without it adding bulk to your petite Apple Plus Sized frame. Vertical detail like buttons, piping or vertical stripes trick the eye into seeing you slimmer.
This is NOT an A-Line skirt. I wouldn't tuck the shirt in (or is this actually a dress???) and the bag adds bulk to her silhouette. It's not a terrible look, quite cute, and the vertical stripes are spot on. But for most petite Plus Sized Apples, a simple A line skirt, top that skims the curves (this one cuts her in half!) worn over the skirt, little wedge heels and a slim structured bag, would alter the look entirely, and trick the eye into imagining you taller and slimmer.