Okay thanks, I was just confused by her smallish head.It's been known that Mei skews towards the chubby/big girl bodytype, as there is some development art that shows her sporting a blue top & sweatpants & her chubbyness is much more noticeable.
And it makes sense, given that she's part of Overwatch's science division, & until the start of the current setting, she was never on the combat field.