American Kennel Club (AKC)
The AKC standard describes the Stafford as smooth-coated, standing 14 to 16 inches at the shoulder, with great strength for its size. The breed should be muscular, active, and agile. The head is short, deep through, with a broad skull, and distinct stop. The foreface is short with black nose. Eyes are dark, round, of medium size, and set to look straight ahead. Ears are rose or half-pricked, not large or heavy. The mouth has a scissor bite with lips tight and clean.
The neck is muscular, rather short, with a clean outline gradually widening toward the shoulders. The body has well-sprung ribs, muscular and well-defined, with a level topline. Forequarters show straight legs, well-boned, set rather wide apart. The feet are well-padded, strong, and of medium size. Hindquarters are well-muscled with hocks well let down. The tail is of medium length, low set, tapering to a point, carried low. Colors include red, fawn, white, black, blue, or brindle, with white markings acceptable.
Fédération Cynologique Internationale (FCI)
The FCI standard, under Group 3 Terriers, Section 3 Bull type terriers, classifies the Stafford without working trial. The breed should be smooth-coated, well balanced, and of great strength for its size. The dog should be muscular, active, and agile. Height at withers is 36 to 41 centimeters for males and 33 to 38 centimeters for females, with corresponding weight proportions of 13 to 17 kilograms for males and 11 to 15.4 kilograms for females.
The head is short and deep with broad skull and pronounced cheek muscles. The stop is distinct with a short foreface. The nose must be black. Eyes are preferably dark but may bear some relation to coat color, round, of medium size, and set straight ahead. Ears are rose or half-pricked, not large or heavy, and fully dropped or pricked ears are highly undesirable. The neck is muscular, rather short, and clean in outline. The body shows close-coupled build with level topline, broad front, deep brisket, and well-sprung ribs. Legs are straight and well-boned. The tail is of medium length, low set, and tapers to a point. The coat is smooth, short, and close. Colors include red, fawn, white, black, blue, or any shade of brindle, with or without white.
United Kennel Club (UKC)
The UKC recognizes the Stafford in the Terrier Group, describing it as a medium-sized dog with a smooth coat, well-balanced, and possessing great strength for its size. The breed is muscular, active, and agile with a broad head and pronounced cheek muscles. The height ranges from 14 to 16 inches at the withers. Weight for males is 28 to 38 pounds and for females 24 to 34 pounds. The height to weight ratio is important, and the dog should be well-balanced.
The skull is broad, deep through, with distinct stop and short foreface. The muzzle is short with tight lips and a scissor bite. The nose is black. Eyes are round, medium-sized, dark preferred, and set to look straight ahead. Light eyes or pink eye rims are faults. Ears are rose or half-pricked, not large, and fully dropped or prick ears are serious faults. The neck is muscular and rather short. The body is close-coupled with level topline, broad chest, and well-sprung ribs. Forequarters have straight, well-boned legs. Hindquarters are well-muscled with parallel hocks. The tail is medium length, low set, and carried low. The coat is smooth, short, and close. Acceptable colors are red, fawn, white, black, blue, or brindle with or without white markings. Black and tan or liver colors are disqualifications.
Other Organizations
The Kennel Club (UK), where the breed originated, maintains a standard very similar to the FCI, emphasizing the breed's smooth coat, balance, and remarkable strength relative to size. The standard stresses that the Stafford should be highly courageous and tenacious, while being totally reliable with people. The Canadian Kennel Club follows standards closely aligned with the AKC. Australian breed standards emphasize the breed's historical role and temperament, noting the combination of courage with affection for family. All major registries agree on the fundamental characteristics: a compact, muscular build, broad head with strong jaws, smooth short coat, and a temperament combining boldness with gentleness toward humans.