How Big Do XL American Bully Puppies Get? A Guide for USA Buyers

Choosing an XL American Bully puppy is exciting, especially if you’re looking for a dog with an impressive build and a confident presence. But how big will your puppy actually get? Adult size depends on several factors, including genetics, sex, nutrition, and overall health. Understanding the expected height, weight, and growth stages can help you set realistic expectations and choose a puppy that fits your lifestyle. 

Before bringing one home, it’s worth knowing what separates a naturally large, well-built American Bully from a dog whose size comes at the expense of its health.

How tall does an XL American Bully get?

The ABKC classifies the XL variety by adult height measured at the withers—the highest point of the shoulders, not the top of the head. Its published ranges are:

These ranges are class guidelines, not a promise that every puppy will reach the upper limit. Height is measured at the withers, the highest point of the shoulders, and individual growth still depends on genetics and development.

How much will XL American Bully puppies weigh?

According to the ABKC, the dog’s weight should be proportional to its body, and they should not get overweight. This is important since even two dogs with similar height can have a different amount of bones and muscles in their bodies. Weight is just one aspect that cannot determine whether a dog is fit.

There are wide general weight ranges that can range from 70 to 150 pounds, which you will find on many websites, but take them just as a description rather than a guarantee. It is better to ask for the parents’ height and weight along with their health status. Do not listen to anyone who promises you an adult dog of a certain weight.

When do XL American Bully puppies stop growing?

XL American Bully puppies have different growth rates and speeds of development in their height than in the growth of muscles and body mass. XL Bullies usually reach their maximum height during puppyhood or adolescence. However, their bodies can continue to broaden, and the muscles can become more prominent.

The growth rate depends on genetics, sex, diet, and overall health. Therefore, it is hard to say with a high degree of accuracy how big an XL American Bully puppy will be when it becomes an adult. It can only be roughly estimated based on the age and the size of the puppy. To understand how big the puppy might grow, it is also necessary to ask the breeder for photos or videos of the dog’s parents and inquire about the sizes of its littermates.

Understanding the characteristics of the American Bully breed can also help you evaluate your puppy’s expected development and set realistic expectations for adulthood.

What affects an XL Bully’s adult size?

1. Genetics and parent size

Inherited factors play a significant role in the height and body structure of an adult dog. The sizes of the dog’s parents can serve as a reference point, but it is not a given: puppies from the same litter can grow up to be completely different sizes.

2. Nutrition and healthy growth

Feed the puppy a complete and balanced diet and consult with your veterinarian about how much the dog should eat as it grows. Feeding a puppy more than recommended will not make it grow faster or stronger: extra calories will be stored as fat and put unnecessary strain on the puppy’s joints. 

3. Exercise, condition and veterinary care

Regular, age-appropriate activity helps puppies build coordination and maintain a healthy body condition. Avoid pushing a growing dog into repetitive, high-impact exercise. Routine veterinary checks help monitor weight, movement, development and any concerns that may affect growth. Once you bring your puppy home, our first-week puppy guide covers practical routines for feeding, settling in and arranging that first veterinary visit.

XL vs. Standard American Bully: what is the difference?

The XL variety is taller than the Standard variety; it is not a label for the heaviest puppy. XL dogs have higher adult height ranges, but both varieties should still maintain a balanced frame and move comfortably. 

Size is only a part of choosing a dog, so think about health, temperament and the power adult Bully needs to care for. Our American Bully temperament guide tells you why a dog’s personality and upbringing are just as important as their appearance.

What should USA buyers check before choosing a puppy?

Before placing a deposit, ask the breeder for clear answers to these practical questions:

• Can I see the puppy standing and walking on a level surface, rather than only posed photos?
• What are the measured adult heights and general health histories of both parents?
• What veterinary records, vaccination and deworming details will come with the puppy?
• Are there written purchase terms, a health guarantee and a clear policy for transport or pickup?
• Can you explain the puppy’s expected development without guaranteeing an exact adult weight?

Be cautious of claims that a puppy will become exceptionally large, or that extreme bulk automatically means better quality. Sound movement, comfortable breathing, a stable temperament, and responsible care are more meaningful than chasing a number. When reviewing a breeder’s claims, ask to see actual health-testing documentation; our article on DNA health testing explains what testing can, and cannot, tell you about inherited risk.

Frequently asked questions

Are XL American Bully puppies bigger than Standard puppies?

They are raised to grow up to be bigger dogs. XLs, as adults, have a height range that starts above the Standard range, although individual puppies can grow at different rates.

Can you tell how big an XL puppy will grow up to be?

Not necessarily. The size of the puppy’s parents, family history, and the puppy’s growth can all provide reasonable expectations, but no breeder can state precisely how big their puppy will grow up to be

Is a heavier XL American Bully always healthier and better quality?

No, because the ABKC considers the weight of the dog to be proportional to its frame and warns against obesity. The condition and structure of the XL American Bully, as well as its movement and body, are more essential.

How do I measure an XL American Bully?

We usually measure a dog vertically from the ground to the withers when the dog stands on a horizontal surface. When measuring for the registry, make sure to follow the specific instructions for measuring dogs.

What should I prioritize when buying an XL puppy?

Prioritize health records, transparent parent information, a written agreement, sound movement and a breeder who answers questions clearly. 

Temperament and early socialization matter alongside physical size; our American Bully temperament guide explains why a muscular build alone does not tell you what living with an individual dog will be like. Size should be only one part of the decision.

Choose for the adult dog, not just the puppy

At American Bully Collective, we believe choosing an XL American Bully puppy should be about more than finding the tallest or heaviest dog. Understanding expected height, learning about the parents’ genetics, and prioritizing health and temperament can help you make a confident, informed decision. 

your puppy the best foundation for healthy growth. If you’re ready to take the next step, explore our XL American Bully puppies or contact American Bully Collective to learn more about finding the right companion for your home.