A. Back of the Arm/Neck
With your elbow slightly bent, measure from the center back of your neck, across your shoulder, and down to your wrist.
B. Chest
Measure under your arms, around the fullest part of your chest with your arms at your side.
C. Waist
Measure around the narrowest part of your torso near your waist.
D. Hips
Standing with your feet together measure the fullest part of your hips.