Hips:
Place the start of the measuring tape on one hip, and wrap around until you have made a loop around the widest part of your child's hips.
Rise:
Place the start of the measuring tape at the lower back, put between the legs and end right below the belly button.
Inseam:
Place the start of the measuring tape at your child's crotch and, with the leg extended, measure to right below the ankle.
Chest:
Place the start of the measuring tape in the middle of your child's chest, wrap under one arm and then the other, causing the tape to meet.
Arm:
Place the start of the measuring tape at your child's armpit, keeping the arm fully extended, and end at the wrist.