GERERAL APPEARANCE- The dog is compact low set, of medium lenght with a refined structure but of sufficient substance to hunt and kill domestic rodents. The parted, straight silky hair presents a well-groomed appearance.

CHARACTERISTICS-  it should display Terrier characteristics, embodying keen alertness, activity and soundness.

TEMPERAMENT- (See under Characteristics)
HEAD AND SKULL- Of moderate length, slightly shorter from the tip of the nose to between the eyes than from the same position to the occiput. The head must be strong and of Terrier character, being moderately broad between the ears; the skull flat and without fullness between the eyes, with fine silky top-not, not falling over the eyes, (a long fall of hair on the forface is very objectionable.)
Nose black.
EYES-  Shall be small, round, not prominent, dark as possible in colour with a keen intelligent expression.

EARS-  Should be small, V-shaped with fine leather, set high on the skull, pricked, and entirely free from long hair.

MOUTH-  Strong jaws, teeth even and not cranped, the upper incisors fitting closely over the lower (scissor bite). Lips tight and clean.

NECK-  Medium length, refined and slightly crested, fitting gracefully into the shoulders. Well covered with long silky hair.
FOREQUARTERS- Shoulders fine and well laid back, fitting with wellangulated upper arms snugly into the ribs. Elbows neither in nor out. The forelegs have refined, round bone and are straight and set well under the body with no weekness in the pasterns.

BODY-  Should be moderately long in proportion to the height of the dog. Level topline, well sprung ribs extending back to strong loins. Chest of moderate depth and breadth. A topline showing a roach or dip is a serious fault.
HINDQUARTERS- The thighs must be well developed and the stifles should be well turned and the hocks well bent. When viewed from behing the hocks should be well let down and parallel with each other.

FEET- Small and well padded, cat-like with closely knit toes, the toenails must be black or very dark.

TAIL- Preferably docked, set on high and carried erect but not over-gay. Should be free of feathering.
GAIT/MOVEMENT-  The movement should be free and true without slackness at shoulders or elbows, there should be no turning in or out of the feet or pasterns. The hindquarters should have strong propelling power with ample flexibility at stifles and hocks. Viewed from behind the movement should be neither too close nor too wide.
COAT-  Must be flat, fine and glossy and of a silky texture with the length of coat from 13 to 15 centimeters (5 to 6 ins) from behind the ears to the set on of tail, but must not impede the dogs action. The legs from knees and hocks to feet free from long hair.
COLOUR-  Blue and tan or Grey-blue and tan, the righer the colour the better. Blue on the tail to be very dark. Silver blue or fawn top-not desirable. Distribution of blue and tan as follows: tan around the base of the ears, muzzle and on the sides of the cheeks; blue from the base of the skull to the tip of the tail, running down the forelegs to near the knees and down the thighs to the hocks; tan line showing down the stifles and from the knees to the feet.
SIZE-  Height: Dogs  Approx. 23 cms (approx 9 ins) at the whithers
                       Bitches  Slightly less
   Weight: Desirable weight from 3.5 to 4.5 kg (approx 8-10 lbs)