There is a changed premise here, between Vina-as-Orion-Slave-Girl and all Orion women seen since. When Vina confronts Pike after the wall seals up, she towers over him, perhaps 6'6", or even 7 feet tall. All Orion women seen since have matched the human female proportions.
Hmmm, that's interesting. I always thought that she was the same height as her 'normal' self....but I guess one can make that connection since Orion Vina isn't in the same shot as Pike, save for the over-the-shoulder shot where she emerges and looks as if she could be Amazonian.
Given the height of some Orion men, I would think there would be tall Orion females as well.