Pair of side elevation drawings of the Bullmastiff in standing and seated postures

A product of the crossing between Bulldogs and Mastiffs, the Bullmastiff is a popular member of the working group of dogs. With origins rooted in England dating back to the mid-1800s, the Bulldog was breed for strength, size, and speed—essential characteristics for any successful guard dog. Despite their knack for tackling intruders, the Bulldog is an exceptionally loyal and docile companion towards its loved ones and can be highly affectionate. Though guard dog training is not necessary for these natural protectors, proper socialization from early puppyhood is a must to ensure your Bullmastiff is well acclimated.

Series of illustrations of the Bullmastiff dog breed lying down, and standing and sitting seen from the front

Male Bullmastiffs have a withers height between 25”-27” (64-69 cm) and a weight in the range of 110-130 lb (49.9-59 kg). Female Bullmastiffs have a withers height between 24”-26” (61-66 cm) and a weight in the range of 100-120 lb (45.4-54.4 kg). The Bullmastiff has an overall body length of roughly 40”-44.5” (102-113 cm), standing height of 30”-34” (76-86 cm), and a typical lifespan of 7-9 years.


*Under Development*

30”-34” | 76-86 cm
40”-44.5” | 102-113 cm
Withers Height:
24”-27” | 61-69 cm
100-130 lb | 45.4-59 kg

Coat Color: Red, fawn, brindle

Temperament: Docile, confident, fearless, reliable, dependable

Breed Size:
7-9 years


Drawings include:

Bullmastiff side elevation (standing), side (sitting), front (standing), front (sitting), side (lying down)

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Dogs are domesticated mammals of the Carnivora order. Descendants of wolves, dogs are the first animals to have been domesticated by humans. Dogs are bred for particular physical and emotional characteristics and are often referred to as ‘man’s best friend’ referring to their high degree of loyalty.