BUST: To find out what size you're wearing, surround your chest with a flexible measuring tape at the part with the greatest volume.
WAIST: Surround the narrowest part of your waist with a measuring tape.
HIP: Stand with your feet together and surround your hips with a measuring tape at the part with the greatest volume.
GIRTH: Place the tape measure in the center of the right shoulder, down front, under crotch and back to the same shoulder. As you measure, keep the tape attached to your body.