A male Labrador retriever should weigh between 65 and 80 pounds and be 22.5 to 24.5 inches in height. A female Labrador retriever should weigh between 55 and 70 pounds and be 21.5 to 23.5 inches in height.
Labrador retrievers are bred to be useful to people. They work as retrievers for hunters, search and rescue dogs, and as assistants to handicapped people. Labrador retrievers have high amounts of energy when they are young. They need to be given proper obedience training, although they slow down and become less active as they age. The lifespan of the breed is usually between 10 and 12 years.