Breed standards are the official guidelines that describe the ideal characteristics, temperament, and appearance of a breed and ensures that the breed is fit for function with soundness essential.
Kennel Club, London 1994
Upstanding, well knit and proportioned, well developed and muscular body.
Compact, powerful terrier, showing gracefulness and an attitude of alert determination, with definite terrier style and character throughout.
Well balanced, long, proportionally lean, with slight stop and flat over the skull. Foreface and jaw very strong, deep and punishing; nose black; nostrils of due proportion.
Dark as possible. Small to medium with keen terrier expression.
Small to medium and V-shaped; carried forward but not too high.
Gums and roof of mouth dark with perfect, regular scissor bite, i.e. upper teeth closely overlapping the lower teeth and set square to the jaws.
Strong and reachy, running into sloping shoulder.
Shoulders flat as possible with elbows carried close to body while standing or moving. Legs straight, bone powerful. Front straight, neither too wide nor too narrow.
Short coupled with good depth of brisket and well sprung ribs. Deep chest. Topline level.
Large and well developed, stifle bent and hocks close to ground giving perfect freedom of hind action.
Round and small. Nails black.
Docked: Set on high and carried erect.
Undocked: Set on high of moderate length to give an overall balanced appearance. Thick at the base and evenly tapering to tip, straight as possible and carried jauntily. An excessively gay or curled tail undesirable.
Free and powerful. Fore and hind legs moving straight and parallel, stifles turning neither in nor out.
Soft and silky, plentiful and wavy.
Any shade of blue with or without black points. Tan permissible in puppies, also a dark colour up to the age of 18 months. A small white patch on chest should not be penalised.
Weight: Mature dog 15-17 kg (33-37 lbs)
Bitches proportionately less, 16 kg (35 lbs) is the most desirable weight to aim for.
Ideal height: Dogs 46-48 cms (18-19 ins) at shoulder
Bitches slightly less.
Any departure from the foregoing points should be considered a fault and the seriousness with which the fault should be regarded should be in exact proportion to its degree and its effect upon the health and welfare of the dog.
Male animals should have two apparently normal testicles fully descended into the scrotum.