Find out about kids' average weight and height from birth to 8 years old – and learn what your child's growth percentile ...

To see if your child is too skinny or overweight, there is a "weight for height" chart or a "BMI" index. These tell if your child's weight is close to what it should be, given her height.

but there’s also no guarantee that your newborn baby, for instance, will fit into a newborn diaper. That’s one reason why diaper sizes are designed for babies of a certain weight rather than a ...