"I think you are looking for a gored skirt. It seems like a 5 gore skirt: 3 in front, 2 in back.
Oddly, this style of dress skirt doesn't seem to be very common right now. In general it's great with slender silhouettes or…"
"If I were in your shoes, having a coverstitch would be essential:
For stretch garments with elastic edges (like legs and arm holes), the coverstitch function alone can create a nice 'double stitch' over a tuned edge with elastic--it's…"