Confused

[TouchandFeel]

A few things regarding the "FATE art shows male Viera as smaller" statement.

1) People are translating two/three separate images (the 3 images on the left, second line down) as if they were a single image and therefore assuming that the males and female are being displayed at the same scale as if they were standing side-by-side. That's not necessarily the case and the male or female may be at a different scale and therefore appear larger or smaller in comparison to the adjacent other images.

2) Even if one were to assume that those images were at the exact same representative scale, all three Viera depicted are actually the same size and basically an optical illusion is causing people to assume the female is larger than the two males depicted.
The first thing contributing to this is the fact that the female is much skinnier than the two males, which makes her appear more elongated which tricks our brain into thinking that the individual is indeed "longer" i.e. taller.
The second thing is that the female has her head tilted back, with her face pointing up. This causes the length of the face and head to "add" to the overall perceived height along with the then altered visual placement of features such as the eyes and nose of the female appearing higher up and adding to the perception of her being taller/larger.

3) The middle male Viera appears even shorter than the other two due to the shorter/clipped ears.

If you go off of other body features as points of reference, such as hip and shoulder height, you can see all three of those Viera are basically the same height.
The main differences shown are the females are skinnier and appear more lithe while the males are broader, particularly in the chest and shoulder region.