Actually, with a mix you never know what you're going to get.Her Mom is a lab about 50lbs and her Dad is a labradoodle about 70lbs he is sired from a standard poodle and a lab. So she should be a pretty good size. With more lab genetics than poodle.
I can't believe I forgot to mention puppy class! I was SO helpful, but to me and to Luna!!slj,
I'd be sure to have the vet appointment made and training (puppy-K) classes set up so that she can get the best start possible as far as training and socialization.