Measure the Circumference of the butt position.
Shoulder to Shoulder:
Measure from back of shoulders. Place the tape on "top" of the shoulders. Measure from the edge of the left shoulder across to the prominent neck bone located at the center of the back of the neck continuing to the edge of the right shoulder.
Shoulder to Bust:
This is the measurement from your mid-shoulder where your bra strap naturally sit down to your bust point (nipple).
Shoulder to Waist:
This is the measurement from your mid-shoulder where your bra strap naturally sit down and measure down following along the curve of your front to your natural waistline which you may have marked with a ribbon.