Careful with the head sizes. To make it believable I'd aim for 6-8 heads high for the whole figure.
Also with the jaw line, when drawing girls I wouldn't define it completely. Leave some of it to the imagination, it will make the face look softer.
Try to leave a little space for the chin as well because that seems to be missing from this.
The pose looks really natural, a real good job there.
One final note, the leg thats bent is much longer than the straight one, careful on that.
Thats all, nice work