This section is from the book "The Manufacture Of Boots And Shoes: Being A Modern Treatise Of All The Processes Of Making And Manufacturing Footgear", by F. Y. Golding. Also available from Amazon: The Manufacture Of Boots And Shoes.
At birth the average height is 193 in. male, and 189 in. female. The average mature statures are 5 ft 9 in. male, and 5 ft. 5 in. female. If the total stature be represented by 67, then the various parts are relatively proportioned -
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Foot from lower edge of tibia to) end of second toe ... J
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The proportion of the various segments of the lower extremities may be given to the total height in a percentage basis, and for the male sex would be -
Thigh (seat to knee)
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20 per cent of the height.
Leg (knee to ankle)
Ankle to ground
The proportions in the infant are different from those it has when it arrives at the adult period; between these two epochs the proportions are constantly altering. The relations in this matter between the two sexes in childhood are nearly the same, and at a certain age - puberty - they commence to take on the characteristics of the adult. The lower extremities, measured from the sole of the foot, double their length before the person reaches three years of age ; and at the age of twelve they have increased four times, and at twenty about five times, their original length. The various parts do not increase at the same rate - those situated near the trunk increase at a greater rate than those more distant; for instance, the leg during its growth increases four and a half times, the height of the foot from the ground three and a quarter times, and the length three and a half times, over what it was at infancy. In growing, the thighs develop first, next the upper part of the legs, and lastly the feet.