BUST
Measure under your arms, around the fullest part of your chest and back, while keeping the measurement tape taut and straight but not too tight.
WAIST
Measure around your natural waistline, at the narrowest part of your torso, above the belly button, keep the tape loose enough to fit one finger between the tape and your body.
LOW HIP
With your feet together, measure around the fullest part of your hips, incorporating your rear, ensuring the tape is straight.