Size matchup
Boxer vs Bullmastiff: size & weight
Typical weight (55-70 lbs vs 100-130 lbs) and height (21-25 inches vs 24-27 inches)—so you can tell who’s bigger on the metrics that matter.
Bullmastiff
large · energy 3/5
100-130 lbs
Weight mid ~115 lbs
24-27 inches
Height mid ~25.5 in
Boxers are athletic large dogs; Bullmastiffs jump into much heavier guardian mass.
Typical weight
- Boxer: 55-70 lbs (mid ~63 lbs)
- Bullmastiff: 100-130 lbs (mid ~115 lbs)
Bullmastiff usually tips the scale higher.
Typical height (withers)
- Boxer: 21-25 inches (mid ~23.0 in)
- Bullmastiff: 24-27 inches (mid ~25.5 in)
Bullmastiff is typically taller at the shoulder.
Size class & fit
Boxer
large · lifespan 10-12 years
Playful, Energetic, Loyal
Bullmastiff
large · lifespan 8-10 years
Gentle, Loyal, Protective
Size drives food bills, car space, crate size, and how hard a jump lands on kids and seniors. Pair this page with lifestyle compare when temperament matters as much as inches.
Planning verdict
Lean Boxer
Lean Boxer if you want a large dog around 55-70 lbs and 21-25 inches, with energy 4/5.
Lean Bullmastiff
Lean Bullmastiff if you prefer large size near 100-130 lbs and 24-27 inches, with energy 3/5.
FAQs
- Which is bigger, a Boxer or a Bullmastiff?
- By typical weight/height midpoints, the Bullmastiff tends to be larger overall. Boxer typically weighs about 55-70 lbs (mid ~63 lbs) versus Bullmastiff at 100-130 lbs (mid ~115 lbs). Height at the shoulder is commonly listed around 21-25 inches vs 24-27 inches. Both are classified as large dogs in our data. On typical midpoints, Bullmastiff tends to be the larger dog.
- Which is taller, Boxer or Bullmastiff?
- Bullmastiff is typically taller at the withers (21-25 inches vs 24-27 inches).
- Which weighs more, Boxer or Bullmastiff?
- Bullmastiff usually weighs more (55-70 lbs vs 100-130 lbs).
- Are Boxer and Bullmastiff the same size class?
- Yes—both are large in our breed data. Individuals still vary by sex and bloodline.
- Do males and females change the size comparison?
- Often yes. Males are commonly at the high end of weight/height ranges and females at the low end. Always check the actual dog (or parents) rather than breed averages alone.
Related size matchups
References
- How to Choose the Right Dog Breed — American Kennel Club (AKC)
- How Long Will Your Dog Live? Size Matters — American Kennel Club (AKC)
- General Dog Care — ASPCA