NextDogMastiff at a glance
- Typical adult weight
- 120–230 lb
- Typical height
- 27.5–30 in+
- Size
- Giant
Mastiffs are known for a huge square head, a dark mask and a massive, heavy build. If your dog shares some of these looks, upload a front photo and a side photo to see how much Mastiff the free DNA test finds, plus the other breeds in the mix.
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Related breeds
Questions
How can I tell if my dog is part Mastiff?
Mastiffs usually have a huge square head, a dark mask and a massive, heavy build. For a quick estimate, upload a front photo and a side photo to the free NextDog DNA test. It compares visible traits with 326 recognized breeds and shows the likely mix.
How big does a Mastiff get?
A typical adult Mastiff weighs 120–230 lb and stands 27.5–30 in+ at the shoulder, which is giant size.
Is the Mastiff DNA test free?
Yes. The NextDog DNA test is free and instant, with no swab and no kit to mail. It is a photo-based estimate, not a genetic test.
Which breeds look like a Mastiff?
Dogs that share some of the same looks include Cane Corso, Great Dane, Bernese Mountain Dog, Newfoundland and Great Pyrenees.