I think it's a Lab mix as well. Labradors are typically 22.5-24.5 inches (male) or 21.5-23.5 inches (female) and 65-80 pounds (male), 55-70 pounds (female), so be prepared for a pretty big pup!
P.S. The height and weight copy and pasted is from their AKC page. Click here to read it (You will learn more about Labradors!): Labrador Retriever Dog Breed Information