How tall is a Bullmastiff?

An adult Bullmastiff stands about 26 inches at the shoulder (AKC mid-range, male). Females typically run 1–2 inches shorter, and individual variation within the breed is roughly ±2 inches.

Is a Bullmastiff considered a large dog?

Yes — at 26" / 120 lb, the Bullmastiff falls into the large-breed size class (shoulder height 23–27"). Out of 252 breeds catalogued, it ranks #35 tallest.

How does a Bullmastiff compare to a person?

At 26" tall, a Bullmastiff stands about 41% of the height of an average adult (5'4" / 64"). The chart on this page draws both silhouettes at the same pixel-per-inch scale so the proportion you see is the real ratio.

Bullmastiff Size Compared to a Person

A Bullmastiff stands 26″ at the shoulder and weighs about 120 lb — that puts it at 41% of the height of an average adult (5′4″ / 64″). Of the 252 breeds catalogued, it ranks #35 by shoulder height and falls into the large-breed size class (Large breeds, 23–27").

Bullmastiff next to a person at scale — 26-inch shoulder height, 120 lb. Drawn by iDogNames. — Bullmastiff at 26″ / 120 lb, next to an average adult at 5′4″ / 135 lb. Drawn to AKC breed standards.

How a Bullmastiff compares

	Bullmastiff	Person	Difference
Shoulder height	26″	64″	-38″
Weight	120 lb	135 lb	-15 lb

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About the Bullmastiff

The Bullmastiff is a large, powerful breed that was developed in 19th-century England by crossing the English Mastiff with the Old English Bulldog. Originally known as the "Gamekeeper's Night Dog," Bullmastiffs were bred to guard estates and track down poachers. Today, they remain exceptional guardians with a calm, confident temperament and an unwavering devotion to their families that makes them both formidable protectors and gentle companions.

Similar-size breeds

The 8 breeds in the Large size class with shoulder height closest to the Bullmastiff.

Afghan Hound — 26″ / 55 lb (same height)
American Alsatian — 26″ / 90 lb (same height)
Bandog — 26″ / 100 lb (same height)
Bernese Mountain — 26″ / 98 lb (same height)
Black and Tan Coonhound — 26″ / 88 lb (same height)
Bloodhound — 26″ / 100 lb (same height)
Boerboel — 26″ / 175 lb (same height)
Bouvier des Flandres — 26″ / 90 lb (same height)

Frequently asked

How tall is a Bullmastiff?: An adult Bullmastiff stands about 26 inches at the shoulder (AKC mid-range, male). Females typically run 1–2 inches shorter, and individual variation within the breed is roughly ±2 inches.
Is a Bullmastiff considered a large dog?: Yes — at 26" / 120 lb, the Bullmastiff falls into the large-breed size class (shoulder height 23–27"). Out of 252 breeds catalogued, it ranks #35 tallest.
How does a Bullmastiff compare to a person?: At 26" tall, a Bullmastiff stands about 41% of the height of an average adult (5'4" / 64"). The chart on this page draws both silhouettes at the same pixel-per-inch scale so the proportion you see is the real ratio.

More on the Bullmastiff

Bullmastiff dog names & full breed page · All large-size breeds · Visual atlas (Large section) · Size comparison home