Official breed standards
There is a great deal of variety among Labradors. The following characteristics are typical of the conformation show bred (bench-bred) lines of this breed in the United States and are based on the American Kennel Club standard. Significant differences between UK and US standards are noted.
Size: Labradors are a medium-large breed. They should be as long from the withers to the base of the tail as they are from the floor to the withers. The AKC standard includes an ideal weight for males of 65–80 lb (29–36 kg) and for females as 55–70 lb (25–32 kg). The guidelines for height vary between the AKC, which gives 22.5 to 24.5 inches (57 to 62 cm) for males and 21.5 to 23.5 inches (55 to 60 cm) for females, whereas The Kennel Club advise males should be 56 to 57 centimetres (22 to 22 in) with females between 55 to 56 centimetres (22 to 22 in) and the FCI quotes a range of 56 to 57 centimetres (22 to 22 in) for males with females ideal at 54 to 56 centimetres (21 to 22 in).
Coat: The Labrador Retriever's coat should be short and dense, but not wiry. The coat is water-resistant, so the dog does not get cold when taking to water in the winter. That means that the dog naturally has a slightly dry, oily coat. Acceptable colours are black, yellow, and chocolate.
Head: The head should be broad with slightly pronounced eyebrows. The eyes should be kind and expressive. Appropriate eye colours are brown and hazel. The lining around the eyes should be black. The ears should hang close to the head and set slightly above the eyes.
Jaws: The jaws should be strong and powerful. The muzzle should be of medium length and should not be too tapered. The jaws should hang slightly and curve gracefully back.
Body: The body should have a powerful and muscular build.
The tail and coat are designated "distinctive [or distinguishing] features" of the Labrador by both the Kennel Club and AKC. The AKC adds that "true Labrador Retriever temperament is as much a hallmark of the breed as the 'otter' tail."