Guide
American Bully Sizes Explained
Four classes, how they differ, and the one that will actually work in your life. Think of this as the decision, not the ruler.
American Bully sizes split into four classes, and the line between them is drawn by height at the withers, not by weight: pocket, classic, standard and XL. Underneath, it is one breed with one temperament, stretched or shrunk. So the real question is not which is biggest, it is which amount of dog your home, your back and your walking habit can carry.
Start from your life, then pick the class
Most people start from a photo and work toward a class. Flip that around. Answer three things first: how much floor space you have, how physically you can hold a determined dog, and how long a walk you will honestly do on a wet Tuesday. The class tends to pick itself after that.
If you are in a flat, or new to the breed
Look at the pocket, under 17 inches and 30 to 55 pounds. It hands you the whole bully look without thirty kilos leaning on the lead, it lifts into a car without a fight, and it eats less. The watch-out is at the extreme short end, where the compression that buys you a low dog can also buy breathing and joint problems. A soundly built pocket sidesteps that. A squashed one does not.
If you want the athlete, and the original shape
The classic, 17 to 20 inches and 45 to 75 pounds, is the lean one: lighter in bone, less exaggerated, nearest to where the breed started, and generally the freest-moving and most physically comfortable of the four. Being the least fashionable is the trade, and it cuts both ways, fewer to choose from but easier on the wallet.
If you want the default family dog
The standard, also 17 to 20 inches but 50 to 80 pounds, is the classic built heavier and blockier on the same height. It is the breed as its written description pictures it, and I think it is the one most households find simplest to live alongside.
If you have the room, the strength and the budget
The XL, 20 to 23 inches and 80 to 120 pounds, is a serious animal. Go in with the space for it, the physique to hold it, and a clear head about what a hundred-pound dog costs across food and vet bills. In return you take on heavier joint loading, poorer tolerance of heat, bigger bills everywhere, and a real handling question if anyone at home is small or shaky on their feet.
The numbers in one place
| Class | Male height | Male weight | Best for |
|---|---|---|---|
| Under 17 in | 30 to 55 lb | Apartments, easier handling | |
| Classic | 17 to 20 in | 45 to 75 lb | Athleticism, original proportions |
| Standard | 17 to 20 in | 50 to 80 lb | Most households |
| XL | 20 to 23 in | 80 to 120 lb | Space, strength, budget |
Across all four, a female lands about an inch lower at the shoulder and ten to twenty pounds under the male figures.
Two words that get sold as classes, but are not
You will see XXL and micro advertised as if they were a fifth and sixth size. Neither is. There is no class above XL and none below pocket, and no written description defines either word.
XXL just means a big XL, and the full breakdown is on the XL versus XXL page. Micro means a very short pocket, and the trouble is that the health risk rises as the dog gets shorter and more packed down, through the airway, the skin folds and the joints, which is why I kept a separate micro versus pocket page on it.
I do run listings under both words, because that is what people type into a search bar, and the advice there matches the advice here exactly.
How I would steer you
Give me the shape of your days, who else is in the house, and the February-walk answer, and the right class is usually obvious inside a sentence. Nine times in ten it is not the one someone arrived set on.
One thing worth hearing, because most people have it the wrong way round: a dog’s temperament varies far more from puppy to puppy than it does from class to class. A level-headed pocket and a level-headed XL are much more alike than two XLs who landed on different temperaments.
The full measurement table · Temperament · What is available in each class
Still weighing up the classes?
Tell me about the household and I will say which of these fits, and I will say so plainly when the answer is that none of them do.