How big will my greatdane/belgium shepard cross get?

I always look at the puppy's forelegs and paws to judge just how big he'll get. The bigger the paws the bigger the adult dog. If he has big forelegs and paws, he's going to be at least the size of a smaller great dane.

I would suggest going to the American Kennel Association web site and doing some research on your breed(s)...

Your dog could potentially be over 100 pounds - hope you have a big car to take him on lots of car rides!