Irish Terrier Weight & Growth Chart

Complete weight guide with growth charts for male and female Irish Terriers from puppy to adult.

Male Adult Weight

25–27 lbs

Female Adult Weight

21–23 lbs

Irish Terrier Weight Overview

Adult Irish Terriers typically weigh between 25 and 27 pounds, with males generally being larger than females. Males average 25–27 lbs while females typically weigh 21–23 lbs.

Athletic and elegant at 25 to 27 pounds and approximately 18 inches tall, they are longer-legged and racier in build than most terrier breeds..

Growth Chart

When Does a Irish Terrier Stop Growing?

Irish Terriers typically reach their full adult height of 18–18 inches by 12 to 15 months and their full adult weight of 25–27 lbs shortly after. Athletic and elegant at 25 to 27 pounds and approximately 18 inches tall, they are longer-legged and racier in build than most terrier breeds..

Factors that influence growth include genetics, nutrition, and spay/neuter timing. Dogs spayed or neutered very early may grow slightly taller due to delayed growth plate closure.

Is My Irish Terrier Overweight?

To determine if your Irish Terrier is at a healthy weight (25–27 lbs target):

Rib test: You should be able to feel the ribs without pressing hard, with a thin layer of fat covering them
Waist check: Viewed from above, there should be a visible waist behind the ribs
Tuck-up: From the side, the abdomen should tuck up behind the rib cage

Their dense, wiry, broken coat coat can mask weight gain, so hands-on assessment is essential. If your Irish Terrier is overweight, work with your veterinarian to develop a safe weight loss plan. Even a 10% reduction can reduce the risk of Hyperkeratosis and other conditions.

Feeding Recommendation

Adult Irish Terriers (25–27 lbs) typically need 0.5 to 0.5 cups of high-quality dry food per day, divided into two meals. A formula suited to medium breeds provides appropriate nutrient density. Need 60 to 90 minutes of vigorous daily exercise including running, hiking, and active play, with their athletic build making them excellent jogging and hiking partners.—adjust portions based on activity level. Budget $43–68/month for food costs.

Weight by Age Table

Age	Male (lbs)	Female (lbs)
3 months	6.3–7.2	5.3–6.2
6 months	13.8–15.9	11.7–13.6
9 months	20.0–23.2	17.0–19.8
12 months	25.0–29.0	21.2–24.7

Frequently Asked Questions

Adult Irish Terriers weigh 25–27 lbs (males: 25–27 lbs; females: 21–23 lbs). Athletic and elegant at 25 to 27 pounds and approximately 18 inches tall, they are longer-legged and racier in build than most terrier breeds..

The Irish Terrier reaches full adult size (18–18 inches, 25–27 lbs) by approximately 12–15 months. Need 60 to 90 minutes of vigorous daily exercise including running, hiking, and active play, with their athletic build making them excellent jogging and hiking partners.. Growth rate is influenced by genetics, diet, and overall care.

For a Irish Terrier at healthy weight (25–27 lbs), you should feel ribs without pressing hard, see a defined waist from above, and notice an abdominal tuck from the side. Even modest excess weight stresses this medium-sized breed's frame and can worsen conditions like Hyperkeratosis.

Feeding amounts depend on age, current weight, and the Irish Terrier's expected adult size of 25–27 lbs. Puppies under 6 months need 3–4 meals daily; older puppies eat twice daily. A high-quality puppy food formulated for medium breeds provides the right nutrient balance. Footpad hyperkeratosis DNA testing is recommended for breeding dogs, and regular foot inspections help catch early signs of this manageable condition..

If your Irish Terrier puppy isn't gaining weight as expected (target adult weight: 25–27 lbs), consult your vet. Common causes include intestinal parasites, insufficient calorie intake, or malabsorption. The breed's predisposition to Hyperkeratosis could also be a factor worth investigating. A fecal test and blood work are typically the first diagnostic steps.