How big will my dog be

Drummerboy, it is difficult to say what the exact size a puppy will grow into as an adult when dealing with pure breds, much less mixed breeds. It all really is dependent upon genetics and sex. Since I don't know the parents of your puppy, how old it is now, what it's weight is, or even what sex it is, all I can do is give you the general heights and weights of both breeds. It is a good possibility that your puppy will grow into a dog whose height and weight will be somewhere in between these figures. But, you never know. Your pup could grow to be the size of a large lab or it could be the size of a small beagle.

Labrador Retrievers generally stand anywhere from 21 inches to 24 inches in height, and are generally 55 to 75 pounds. Some are smaller, some are larger. Again, genetics & sex play a big role in this. Beagles generally stand anywhere from 13 inches to 15 inches in height, and are generally 20 to 25 pounds. Saying that, I have seen some beagles weigh in at 15 pounds and some at 40 pounds.

Most likely medium size with really short legs.
Wish I had the pic on my computer.