Proportion Balance is the keystone of the terrier's anatomy. The chief points of consideration are the relative proportions of skull and foreface, head and frame, height at withers and length of body. The height at withers is slightly greater than the distance from withers to tail, i.e. by possibly 1 to 1 inches on a 14 inch dog. The terrier is of medium bone, not so heavy as to appear coarse or so light as to appear racy. The conformation of the whole frame is indicative of strength and endurance.
Dark rims are desirable.
Fold is level with the top of the skull or slightly above. When alert, ear tips do not extend below the corner of the eye. Flat and fairly broad between the ears, narrowing slightly to the eyes. The stop is well defined but not prominent. Teeth are large with complete dentition in a perfect scissors bite, i.e., upper teeth closely overlapping the lower teeth and teeth set square to the jaws.