Seven-year-old girls of standard weight, which is about 49.5 pounds, average about 47.7 inches in height. Depending on stature, nutrition and other elements, any height between 3.7 feet and 4.2 feet can be considered normal and healthy for a 7-year-old girl.
Children typically grow around 2.5 inches per year prior to puberty. Genetics have a great deal to do with a child's height. Shorter parents are more likely to have short offspring, while taller parents may pass their DNA on to create taller children.
Normal and average heights for children and adults can vary greatly between world regions, races and ethnic groups of people.