Tyger sketches

[Samszym]

I think it's a problem of direction more than proportion, it seems like her mouth/chin forms belong to a head that is is tilted down but her eyes and forehead belong to one that is tilted up. Make sure you've got a consistent angle on everything, it's really east to draw a facial feature at a different perspective or angle than the rest of the head and it throws everything off.
I'd also probably move her neck forward a little, it looks like it connects too far back.