Thread tape measure under your arms. across your shoulder blades at back around the fullest part of your bust at font. Relax your arms at sides while keeping the tape parallel with the floor. If this measurement falls on the 1/2 inch round up.
Bend to one side to find natural indentation in your torso. This is your natural waist. Run the tape around your natural waistline. keeping the tape parallel with the floor and one finger between your body and the tape for a more comfortable fit.
Stand on a level surface with your feet together. Measure around the fullest part of your hips and bottom (approximately 7″ – 9″ below waistline). keeping tape parallel with the floor.