How Big Does a Bull Terrier Get?

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You might be planning to get a Bull Terrier but you’re wondering if the dog’s size would be compatible with your apartment’s space. Fortunately, Bull Terriers are one among other breeds that are best to have in your apartment. So, how big does a Bull Terrier get?

How Big Does a Bull Terrier Get?

A full-grown Bull Terrier grows between 35 to 75 pounds with a height range between 21 to 22 inches tall. A miniature Bull Terrier grows between 25 to 33 pounds with an average height of 10 to 14 inches. It depends on whether it’s a male or a female.

This article will talk about a full-grown Bull Terrier. If you want to learn more, continue reading.

Bull Terrier puppy walking in a lawn

Average Size of a Bull Terrier 

A Bull Terrier’s size varies, it generally differs according to its gender. Males are generally larger than female Bull Terriers. A female Bull Terrier has a size range of 50-60 pounds. On the other hand, a male one reaches the size of 60-70 pounds.

They both stand between 21-22 inches.

Bull Terriers are larger than their ancestors’ English Bulldogs or the British Bulldog. Male English Bulldogs only weigh 50 pounds while females weigh 40 pounds. Both have heights ranging between 14-15 inches tall.

However, their extinct Terrier ancestors are larger than Bull Terriers and Old English Bulldogs. The male weighs about 55-80 pounds, while the female weighs about 45-70 pounds.

This breed of dog reaches its full-grown stage at the age of 20-24 months old. However, it reaches its full height earlier at the age of 12-14 months old. Although both genders exhibit different sizes, there’s no evidence that proves one gender outgrows the other one.

Usually, a number of factors dictate the maturity of each dog upon reaching its full size.

Full-Grown Miniature Bull Terrier 

A Miniature Bull Terrier replicates the Standard Bull Terrier features but comes in a smaller version. A full-grown Miniature Bull Terrier weighs 23-33 pounds and stands 10-14 inches tall. Similar to bull breeds, it has a lot of muscle mass to its frame.

It has the right size for playing and cuddling. 

The miniature size comes from the different ways of breeding. Miniature Bull Terrier undergoes three breeding stages. First, breeders pair a smaller breed to the dog.

Second, they would introduce a dwarfism gene to the dog. Third, they would keep on breeding from the smaller breed.

Bull Terrier standing near a lake

A Miniature Bull Terrier reaches its full size when it reaches the age of 11-12 months. However, it reaches its full height first when it turns 6-8 months old. Once a Miniature Bull Terrier reaches its full height, it doesn’t add any more bulk or muscle mass.

It reaches its full size slowly in comparison to other small dog breeds.

Maturity of a Bull Terrier

A standard-sized Bull Terrier mentally matures at the age of 12-48 months. This breed of dog differs when it comes to maturity. On average, most of them mature when they turn two years old.

On the other hand, the Miniature Bull Terrier mentally matures when it turns 17 months old. In general, smaller breeds mentally mature the same time they reach their full size.

Maturity in a dog causes shedding off some of its puppy nature driven by the hormonal changes happening in its body. Some of the unpleasant or troublesome behavior calms down. You can also expect your dog to know how to calm itself more quickly and relax for a while.

Maturity brings confidence in your dog as he already experienced a lot of social interactions and has reached its full size.

As mentioned earlier, a mature dog displays social confidence only if socialized and trained well from a young age. Social confidence is a positive trait as it gives you confidence as the owner that you can publicly take your dog out. However, in the case of a Bull Terrier, this breed of dog has an aggression issue when out in the public.

Be mindful of the existing breed-specific legislation on “bull-type” breeds implemented in your state. 

Helping Your Dog Reach its Full-Size 

Healthier Bull Terriers manifest a better chance of reaching their full-size potential. To help your Bull Terrier, ensure you provide appropriate food and exercise according to its age. Giving your dog food inappropriate for its age or doing too much at an early age can interfere with your dog’s growth plate.

Bull Terrier sitting on the grass

For example, put a caution on your Bull Terrier puppy’s activities until your dog turns eight months old. Or if you have a miniature Bull Terrier, be cautious of its activities until it turns four months old. Their growth plates close during this stage.

Growth plates refer to soft areas found at the ends of a puppy’s long bones. These growth plates allow your dog to grow longer and dense.

Spaying or neutering is another way to help your Bull Terrier reach its full size. However, it’s crucial not to do it too soon. It’s best to consult your vet about the right age to neuter or spay your dog.

One danger of neutering your dog at a very early age can lead to deprivation of the important hormones your Bull Terrier needs to grow. 

Related Questions

Is a Bull Terrier a Good Family Dog?

A properly socialized and trained Bull Terrier makes a good family pet. However, buying a Bull Terrier as a first-time dog owner isn’t recommended. This breed of dog has incredible strength and can play rough with kids and other pets.

How Much Should a 4 Month Old Bull Terrier Weight?

A four-month-old Bull Terrier weighs around 15-25 pounds for a male while a female Bull Terrier weighs between 10-20 pounds. Always measure the food you give your dog and never leave food in its bowl all the time. Obesity negatively impacts your dog’s life length.


To sum it up, a Bull Terrier should have its maximum length ranging between 35-75 pounds and stands 21-22 inches tall. On the other hand, a miniature Bull Terrier should grow between 25-33 pounds with a height of 10-14 inches. As a responsible Bull Terrier owner, make sure you assist your dog in reaching its full-size potential.