Have your child stand up tall, legs together, arms at sides. Keep your tape measure parallel to floor as you measure each area.
Chest
Slide a measuring tape under your child's arms and measure around the widest part of the chest and back.
Waist
Measure the natural waistline, which is the narrowest point of the torso, at or near the belly button.
Hips
Measure around the widest part of your child's hips.