Measure over the undergarments you normally wear. Hold the tape measure comfortably snug, but not tight.

Height: Standing against a flat wall without shoes, from floor to top of your head.
Full Bust: Around the fullest part of the bust and straight across the back.
Upper Bust: Directly under the arms, straight across the back and above the bust.
Waist: Tie a narrow elastic around waist and let it settle naturally at your waistline. Measure over the elastic. Keep the elastic in place for the next measurement.
Neck to Waist Length: From the most prominent bone at the base of neck to the natural waistline.
Hips: around the body at fullest part, usually 7" - 9" below waist.