The size of most children (94%) falls between the 3rd and the 97th centiles. These children are regarded as having a normal (average or appropriate) size for their age and are growing well. Centile charts, therefore, indicate the range of normal growth.
The range of size between the 97th and 3rd centiles is regarded as normal.
The size range for older children is different to that in newborn infants when the 10th and 90th centiles are used to define appropriate size for gestational age.