How to measure:

WEIGHT:

Weigh your child using either a home pediatric scale or a regular bathroom scale. Remember if you are using a home pediatric scale, your infant should be weighed naked. Be especially careful to limit a newborn's exposure to a cold environment. Never leave an infant unattended on a baby scale. If you do not own a pediatric scale, you can calculate your child's weight by holding your baby and standing on a bathroom scale. Jot this number down; then stand on the scale without the child. Subtract the first number from this number, and you'll have your baby's weight.

HEIGHT:

You can use a simple tape measure to check your baby's length at home. To obtain a correct measurement, it will be necessary to lay your baby on his or her back. Position the baby's head against a wall. Holding the baby's knees together and pressing them gently, place a tape measure from the wall down to the infant's heels. It may be necessary to have one person hold the infant while another measures.