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Mastiff Size & Dimensions – How Big Are Mastiffs?

Mastiffs are considered a very large dog breed.

Mastiff Size & Dimensions
Weight:60-90 kg.
Height:70-91 cm (27-36 inches) for males
64-81 cm (25-32 inches) for females.
Body Length:76-91 cm (30-36 inches).
Note: Body Length is measured from the base of the tail to the centre of the chest bone & Height is measured from the bottom of the foot to the top of the shoulder (Withers Height)

How Big Are Mastiffs Compared to Other Breeds?

Compared to smaller breeds such as Chihuahuas or Dachshunds, Mastiffs possess an imposing stature that rivals that of other giant breeds like Great Danes and Saint Bernards. Their robust build and strong physique make them formidable companions, suitable for roles such as guardianship and protection within the very large dog category.

How Much Variation in Size Is There Amongst Different Mastiffs?

There can be considerable variation in size among Mastiffs due to factors such as genetics, breeding standards, and individual differences. While they generally fall within the very large dog category, some may be larger or smaller depending on factors like lineage and breeding practices.

To determine if a Mastiff is at a healthy weight, you should be able to feel their ribs without excess fat covering and observe a visible waistline when viewed from above. Additionally, their body should appear proportionate, without any noticeable protruding bones or excessive fat deposits, indicating an optimal balance for their size and breed.

When do Mastiffs Stop Growing?

Mastiffs typically stop growing between 18 months and 3 years of age. By this time, they are considered fully grown and have reached their adult size and weight. As puppies, Mastiffs can grow quickly and may gain several pounds each week. It is important to provide them with proper nutrition and exercise to ensure they grow at a healthy rate. They require a high-quality diet that is rich in protein and nutrients to support their rapid growth. They should also receive plenty of exercise, including regular walks, to keep them healthy and prevent obesity.

Can You Predict the Size of Mastiffs When it is a Puppy?

While it is not always possible to predict exactly how big a Mastiff will grow when they are a puppy, there are certain factors that can give you an idea. By looking at the size of their parents and other adult relatives, you may be able to estimate their eventual size. However, keep in mind that individual Mastiffs can vary in size even within the same litter.

Essential Items Size Guide for Mastiff

ItemSize CategoryMeasurementWhy
CrateVery Large122×76 cm (48×30 inches)Provides ample space for the Mastiff to stand, turn around, and lie down comfortably.
BedVery Large120×90 cm (47×35 inches)Offers sufficient room for the Mastiff to stretch out and rest without feeling cramped.
KennelVery Large150×100 cm (59×39 inches)Provides enough space for the Mastiff to move freely while providing shelter and security.
CollarLarge/X-Large60-75 cm (24-30 inches)Accommodates the Mastiff’s thick neck while allowing room for adjustments as needed.

Mastiff Size & Dimensions – How Big Are Mastiffs?