Small: 34-36" Cup Size A/B
Medium: 36-38" Cup Size B/C
Large: 38-42" Cup Size C/D
How to measure your skirt length:
Measure from your Upper Hip where you would wear your skirt (it's different for everyone) to your Outside Leg. If you already have a skirt that fits you well, lay it flat and measure it from the waistband to the hem~ and that's your perfect length!