How to measure yourself...
To measure, take a tape measure and measure yourself while nude. Make sure the tape measure is flat, not twisted, and always make sure that it is not cutting in or squashing the area you are measuring.
Bust: Without a bra, place tape measure around the widest part of your bust (usually the part with the nipples!) Be careful not to let the tape measure slip down at the back, or squash you.
Waist: Place tape measure between the bottom of your ribs and the top of your hip bones (the easiest way to find your waist is to stand in front of front of a mirror and suck your tummy in hard - you should see it!).
Hips: Place tape measure around your hip bones