Crissakes...
Alright, so I looked up "average human hand size" on Google and lo, Wikipedia, Knower of All Things, cited a medical journal publishing research conducted on the matter:
ISPUB - Determination Of Sex By Hand Dimensions
In their methodology, they state that 'hand breadth' was measured as the "straight distance from the most laterally placed point on the hand of 2nd metacarpal to the most medially placed point located on the head of 5th metacarpal"...in other words, they did not include the thumb.
They reported that womens' hand breadth varied from 6.7cm to 8.8cm (7.48cm average), or 2.6" to 3.5" (2.94" average)...in other words, about three inches wide, on average.
Men tend to have broader palms than women, but even assuming that wasn't true, I have a broad palm that is 15% wider relative to my fingers measured at the point where the proximal and intermediate phalanges meet.
Assuming the lady in the pic I posted was average for a women and her hand is 15% broader than her fingers, 2.94 * .85 * 3.75 = 9.37" ....in other words,
pretty much what we've been saying all along.
Oh and by the way, we can close the book on this "two hands covers him" bullshit: