The length of the arm seems to be fine to me. I want to say that the it also looks a bit bulky but I'm not sure it really is. I think it may be the way you represented shading that makes it look this way. It makes it look ehh blocked in, fragmented.

The shading on the torso seems to be a bit much. I think if you tone back the shading a little bit more, it will look a little better.

Also, the hair. Just the hair on our right side doesn't look like it's affected by the wind quite enough. It could use a little bit more movement.


Hope that helps you out