Measure the fullest part of your bust, keeping the measuring tape parallel to the floor.
Bend side to side and find the natural bend in your body; this is your natural waist.
Note: It may not be the smallest point.
Measure the fullest part of your hips, approximately 8" below the natural waist.
Measure from your crotch down to the desired length on body. You may also measure pants that you currently own and like. Lay the garment flat and smooth out. To get the inseam length, measure on the front from the crotch point, along the seam, to the hem.
It is best to have someone take the measurements for you, measuring over undergarments only.