According to this page which cites "Steckel, Richard H. and Roderick Floud (eds.)Health and Welfare during Industrialization Chicago : University of Chicago, 1997" as a source, the average height of a Frenchman between 1800 and 1820 was 164.1 cm.
According to the French historian, Marcel Dunan (1963):
"If one refers to the Memoirs of Marchand, t. II, 1955, p.338 "the total height of the crown to heel is 5 feet, 2 inches, 4 lines",
or (French measures) 32.47 cm X 5 + 2.7 X 2 + 0.22 X 4 = 1m 68.6.
These measures have been taken by Antonmarchi helped by Marchand.
For its part, the No. 8 (January 1963) Bulletin Quarterly information fields of French St. Helena, the Journal of Andrew Darling, English upholsterer who was responsible for taking exact measurements that I am assisted by General Montholon:
size 5 feet, 7 inches, or (English measure): 30.47 cm X 5 + 2.54 X 7 = 1m 70.
From these two stories we can conclude that the size of Napoleon was not lower 1m 68.6"
Dr. Antommarchi did perform the autopsy on Napoleon. While an original source detailing Dunan's claims appears to be difficult to find, he is cited often in relation to Napoleon's history.
The confusion and misrepresentation of Napoleon's height can be attributed to a combination of the following: