Paw size is breed dependant too. My borzoi's feet are only 1/3 the size of my pointing griffon puppy's feet. His feet are HUGE.
My borzoi weighs about 80 lbs and is 30-31 inches tall at the shoulder, and our griffon puppy's adult height and weight should be 22-24 inches tall and 45-50-ish pounds.
At her age and with the pic of her laying down it's hard to tell what mix she is, and how big she is. She does look shepherd. As for something else, maybe akita?