The Kerry is its area and blue is its color, but it is more than a Terrier. The Kerry Blue Terrier stands out as a work dog, not only able to hunt rats, but it can also perform shepherd, collector, farm guardian and watchdog tasks. In addition it is an exquisite show dog. 
The Kerry Blue Terrier receives its name from its native county in Ireland, and has a distinctive blue gray color, uniform in the dog, and that in the adult can be any blue gray tonality, from deep chalkboard to light blue gray (with darker coloration at the muzzle, head, ears, tail and feet). It is a well done Terrier, with a short and straight back, good chest depth, not round in the thorax. The head is elongated but proportional to the body; the skull is flat with a very light stop; the apparent length of the muzzle equals the length of the skull. Clean cheekbones; “V” shaped ears, small, Hound type nape of the neck or dropping. The eyes are dark and small, not prominent. The neck moderate in length and clean.  Unlike most Terriers, its coat is soft, thick and wavy; the hard and rough coats are severely penalized. It stands from 46 to 49 cm, the female about 4 cm less; the weigh for the male adult is 16 to 20 kg, the females less in proportion.
An entertaining, smart Terrier, the Kerry Blue can out do its owners if not taught properly. Bold and fun loving, this Terrier needs a hands on owner.
A very elegant Terrier, the Kerry Blue is fantastic with children, a good guardian and purity emblem as a show dog. Its Irish origin has made it a robust worker, who is aggressive towards other dogs, and knows how to defend itself. It has quite a character, and knows how to handle its owner to be able to get what it wants. It is a perfect sized dog for an apartment, which adapts well to many lifestyles.
The Kerry Blue usually needs help carrying its ears: the puppy’s black coat lightens to a deep blue. The puppy that begins to lighten too soon can become too light. 
The Kerry Blue weighs between 225 and 350 g at birth. It is born black, perhaps with small white spots at the chest or feet, and perhaps some white hairs at the stomach. Very rarely a brown puppy with a pink nose is born, and some believe it should be sacrificed, since they would have health problems. The tail and dewclaws are docked a few days after birth. As an adult, the tip of the tail should touch an imaginary horizontal line from the highest point in the head. The ear carriage is important for the Kerry Blue appearance, and in most cases would have to be helped with tape (or glue). New owner are strongly recommended to seek professional help and expert in fixing ears. The coat changes colors during adolescence, from black to blue. White spots, assuming they are not too large, should have to disappear when the dog becomes an adult. The Kerry Blue needs plenty of careful, socialization during the first year to avoid aggression and other antisocial behaviors.
A robust and versatile Terrier, the Kerry Blue has a very strong body and a healthy mind. Aside from “stripping” (and it is a large Terrier), hair care is not very demanding, although it is to achieve a show coat. While a decade ago the Kerry Blue was notably long-lived (more than 15 years), lately there has been a strong increase of malign tumors in elder specimens, reducing longevity to less than 13 years. The buyer should check the different lines carefully to avoid reducing cancer risks. Some eye problems occur, including entropion and distichiasis.
Hip dysplasia is not a problem in the breed, but elbow is. There is a neurological disease that affects young specimens, with limb rigidity as the first symptom, progressing in a few months to the impossibility of walking, which is called extra pyramidal nuclear abiotrophy.
The Kerry Blue is meant to be the only dog in the house. The breed prefers human company over other dogs.