Chest contour: Measure just above the areola.
Waist Contour: Measure at the narrowest point that usually coincides just at the end of the ribs.
Hip contour: Measure where the hip is widest.
Length: Measure from the waist to wherever the skirt reaches (usually, the skirt is placed just above the tip of the shoe to avoid rubbing the floor). Take the measurement with a shoe of similar height to the one you will wear.