Labrador retrievers are sturdy, solid dogs. They are almost square in appearance, with a strong body and sturdy legs. The maximum height for a male is 24 inches, which puts them in the medium-size dog category, but their sturdy build can make them seem much larger. Weights range from 85 pounds for a large male to 55 pounds for a smaller female. Field line bred dogs are often taller and somewhat thinner in build.