Step 1
Measure around the fullest part of your bust, keeping the tape parallel to the floor.
Step 2
Measure around the narrowest part of your waist, keeping the tape parallel to the floor.
Step 3
Measure around the fullest part of your hips, keeping the tape parallel to the floor.
Chest
Measure all the way around your torso immediately above your bust
Bust
Wearing your usual bra, with arms relaxed at your sides, measure your bust at the fullest point, keeping the tape parallel to the floor.
Shoulder
This is one that may be easier with the help of a friend. Measure across your upper back from the tip of one shoulder to the tip of the other. Try not to hunch over.
UnderBust
Measure all the way around your torso immediately above your bust.