The skull should be very large - the larger the better - and in circumference should measure (round in front of the ears) at least the height of the dog at the shoulders. Viewed from the front it should appear very high from the corner of the lower jaw to the apex of the skull, and also very broad and square. The cheeks should be well rounded and extended sideways beyond the eyes. Viewed at the side, the head should appear very high, and very short from its back to the point of the nose. The forehead should be flat, neither prominent nor overhanging the face; the skin upon it and about the head very loose and well wrinkled. The projections of the frontal bones should be very prominent, broad, square and high, causing a deep and wide indentation between the eyes termed the "stop". From the "stop" a furrow both broad and deep should extend up to the middle of the skull, being traceable to the apex. The face, measured from the front of the cheek-bone to the nose, should be as short as possible, and its skin should be deeply and closely wrinkled. The muzzle should be short, broad, turned upwards and very deep from the corner of the eye to the corner of the mouth. The nose should be large, broad and black, and under no circumstances should it be liver coloured or brown; its top should be deeply set back almost between the eyes. The distance from the inner corner of the eye (or from the centre of the stop between the eyes) to the extreme tip of the nose should not exceed the length from the tip of the nose to the edge of the under lip. The nostrils should be large, wide and black, with a well-defined vertical straight line between them. The flews, called the "chop" should be thick, broad, pendant, and very deep, hanging completely over the lower jaw at the sides (not in front). They should join the under lip in front and quite cover the teeth. The jaws should be broad, massive and square, the lower jaw should project considerably in front of the upper and turn up. Viewed from the front, the various properties of the face must be equally balanced on either side of an imaginary line down the centre of the face.