Ok, time for some fun with math & science
I copied this chart and formulas from
http://www.shodor.org/succeed/forensic/romanov.html. These are the lengths of various bones identified as the Romanov's remains.
Skeleton Tandem Repeats Length of Femur (cm) Length of Humerus (cm) Length of Radius (cm)
1 9, 10 44.79 31.5
2 6, 10 37.64 26.15
3 (Child) 8, 10 38.9 27.1
4 7, 10 42.5 30.0
5 (Child) 7, 8 38.9 27.21 20.34
6 (Child) 8, 10 37.6 26.2 23.0
7 8, 8 39.4 27.40
8 6, 9 38.32 26.68
9 6, 6 37.32 25.92
You can use these 3 equations to figure the approximate height of any of the bodies:
- 2.38(femur length) + 61.41 cm = height in centimeters +/- 3.27
- 3.08 (humerus length) + 70.45 = height in centimeters +/- 4.05
- 3.78 (radius length) + 79.01 = height in centimeters +/- 4.32
Skeleton #4 has been identified as Nicholas II, and skeleton #7 as Alexandra.
For Nicholas, the first equation gives a height of 162.56cm (give or take 3.27cm). The second equation puts him at 162.85cm (give or take 4.05cm). When you figure in the variables, his lowest possible height is 159.29cm, and his tallest is 166.9cm.
For Alexandra, the first equation gives a height of 155.182cm (give or take 3.27cm). The second puts her at 154.842cm (give or take 4.05cm). Alexandra's lowest possible height is 150.378, and her tallest is 158.892.
So, at her tallest, Alexandra was still 0.398cm
shorter than Nicholas's shortest possible measurement. But since these are all approximations, there's a lot of wiggle room between the various possibilities. For example, there are 16.522cm difference between Nicholas's tallest possible measurement and Alexandra's shortest. I think we all agree that the tsar was NOT 6.5 inches taller than his wife, but it's a possibility, according to the numbers.
In short (har har) unless someone discovers a photo of the tsar and the empress standing barefoot back-to-back with her hair down, we'll never really know who was taller or shorter or by how much. I think it's safe to say that Alexandra was at least a fraction of a centimeter shorter than her husband. Nicholas may have been a relatively short fellow, but both his femur and his humerus were longer than Alexandra's by about 3cm, which indicates a taller overall height, and the equations back this up. I think it's also safe to say that they were within a couple inches of each other, but the varying heights of Alexandra's hats, hair, and high heels are likely to make it virtually impossible to figure out with any real degree of accuracy. I'd be willing to bet that because of Alexandra's wardrobe, even people who knew the imperial couple would have had a hard time telling you who was taller or shorter...