BUST: Measure around the body at the fullest part of the bust, keeping the tape measure parallel to the floor.
UNDERBUST: Measure around the body right under the bust, keeping the tape measure parallel to the floor.
WAIST: Measure the natural waist, i.e. the smallest circumference just above the belly button. Tying a piece of elastic/string firmly around the waist allows vertical measurements to be taken more accurately.
HIPS: Measure the widest part - this is generally between 18-25cm (7"-10") down from the waistline.
HIPS plus BELLY BULGE (Full-Hips Measurement): Measure taking into account belly bulge, i.e. this measurement is always greater than Hips. You can take the full-hips measurement over something vertically down from your tummy (e.g. a ruler or just your hand).
NECK: Measure the base of the neck touching the front collarbone.
BICEP (Upper Arm): Measure the bicep with the arm bent.