Thread tape measure under arms, across shoulder blades at back around fullest part of bust at front. Relax arms at sides while keeping tape parallel with floor. This is your bust measurement. If this measurement falls on the ½ inch, round up.
Bend to one side to find natural indentation in torso. This is your natural waist. Run tape around natural waistline, keeping tape parallel with floor and one finger between body and tape for a more comfortable fit.
Stand on a level surface with feet together. Measure around fullest part of hips and bottom (approximately 7"-9" below waistline), keeping tape parallel with floor.