Long, but in nice proportion to the rest of the body; the skull flat, rather narrow between the ears, and narrowing slightly toward the eyes; free from wrinkle, with the stop hardly noticeable except in profile. The jaws must be strong and muscular, but not too full in the cheek, and of good punishing length. The foreface must not fall away appreciably between or below the eyes; instead, the modeling should be delicate. An exaggerated foreface, or a noticeably short foreface, disturbs the proper balance of the head and is not desirable. The foreface and the skull from occiput to stop should be approximately equal in length. Excessive muscular development of the cheeks, or bony development of the temples, conditions which are described by the fancier as "cheeky," or "strong in head," or "thick in skull" are objectionable. The "bumpy" head, in which the skull presents two lumps of bony structure above the eyes, is to be faulted. The hair on the upper and lower jaws should be similar in quality and texture to that on the body, and of sufficient length to present an appearance of additional strength and finish to the foreface. Either the profuse, goat-like beard, or the absence of beard, is unsightly and undesirable. Teeth: Should be strong and even, white and sound; and neither overshot nor undershot. Lips: Should be close and well-fitting, almost black in color. Nose: Must be black. Eyes: Dark brown in color; small, not prominent; full of life, fire and intelligence, showing an intense expression. The light or yellow eye is most objectionable, and is a bad fault. Ears: Small and V-shaped; of moderate thickness; set well on the head, and dropping forward closely toward the outside corner of the eye. The top of the folded ear should be well above the level of the skull. A "dead" ear, hound-like in appearance, must be severely penalized. It is not characteristic of the Irish Terrier. The hair should be much shorter and somewhat darker in color than that on the body.
