At birth the mean length of boys is 18 1/2 inches, and of girls is 1 1/8 inches. Growth is most rapid immediately after birth and continually diminishes until about five years of age, from then until 16 years the annual growth is 2 1-5 inches; during the next year, 1 1/2 inches, and during the next two years, one inch only. The mean height of man has been estimated at 5 feet 4 inches.

A man is taller in the morning than at night by half an inch