Neapolitan Mastiff Size Explained: How Big Are They Compared To Others?

Last Updated on April 11, 2023 by Amin Tawar

Neapolitan Mastiff Height

Neapolitan Mastiff Size
Neapolitan Mastiff Size Explained: How Big Are They Compared To Others?

The Neapolitan Mastiff, also known as the Mastino Napoletano, is a huge dog of the mastiff family. It is related to the classic Italian guard dogs. 

Since ancient Rome, the Neapolitan Mastiff has been a fearsome guardian with its enormous size and intimidating demeanor. These enormous creatures are now referred to as gentle giants.

They are lovingly called the Neo and Mastino by some dog enthusiasts, as these are Giant dogs. 

Neapolitan Mastiffs might not be the most excellent choice for first-time dog owners or those who live in apartments. 

In terms of height, the size range for females is between 24 to 27 inches, whereas the range for males is between 26 to 30 inches. Because of their enormous size, they require room and a proper environment to develop. 

Height Centimeter Inches 
Neapolitan Mastiff (male)65–75 cm26–30 in
Neapolitan Mastiff (female)60–68 cm24–27 in

Neapolitan Mastiff Weight

As hinted above, the Neapolitan mastiff is a giant dog breed. These huge and strong canines serve as intimidating guardians and are astonishing in appearance. 

Their robust stature and muscular build significantly increase their body mass. The Neapolitan Females weigh between 110 and 130 pounds, while males are between 130 and 150 pounds.

The size of a female Neapolitan mastiff differs from a male Neo. Males tend to be large and giant-like, while females are often shorter and slimmer. 

Because of how distinct they appear, sometimes, people mistake them for being separate breeds.

Weight KGPounds 
Neapolitan Mastiff (male)60–70 kg130–150 lb
Neapolitan Mastiff (female)50–60 kg110–130 lb

Neapolitan Mastiff Puppy Size

Young Neos are active the same as any puppies, but as they age, they like to laze around the house or yard. 

It’s pretty astonishing to watch the minuscule puppies develop into these robust, intimidating guard dogs. 

The average puppy size of the Neapolitan Mastiff should weigh between 18 and 20 kg for females and 20 and 22 kg (44 – 48.5 lbs) for males at three months old. 

You shall look at the growth chart below to understand the growth of a miniature Neapolitan puppy to a massive full-grown dog.

Neapolitan Mastiff AgeWeight (lbs)Weight (kg)
3 Months44 – 48.5 lbs20 – 22 kg
6 Months77 – 88 lbs35 – 40 kg
8 Months95 – 106 lbs43 – 48 kg
10 Months114 – 128 lbs52 – 58 kg
12 Months121 – 137 lbs55 – 62 kg
16 Months132 – 143 lbs60 – 65 kg
18 Months143 – 148 lbs65 – 67 kg

Neapolitan Mastiff Full-Grown Size

The Neapolitan Mastiff is a giant breed of dogs owing to which; the prospective owners of Neapolitan Mastiffs want to know exactly how big they will reach in their adult form. 

So as to make the necessary accommodations for your new pet. If you are also looking to adopt this gentle giant, then knowing its full-grown size is essential for you.

However, it is not an easy question that can be addressed in exact figures. As the response might not be realistic because of how various breeds mature — notably because dogs can differ even within the same breed. 

It is well known that Neapolitan Mastiffs develop quickly, with some of them gaining up to 150 lbs during the initial 15 months of their lifespan. 

They will develop more in height than in weight throughout the first year of being born. Between the ages of 15 and 18 months, the majority of Neapolitan Mastiffs reach full maturity. 

At this stage, the height of the male Neapolitan Mastiff ranges from 26 – 30 inches (66.04 – 76 cm), and for the female, it is 24 – 27 inches (60.96 – 68 cm). 

In terms of their weight, the fully grown male Neapolitan Mastiff weighs about 130 – 150 lbs (60 – 70 kg), and the fully grown female weighs about 110 – 130 lbs (50 – 60 kg).

Neapolitan Mastiff Litter Size

Although Neapolitan Mastiffs are renowned for their imposing look, they can also be affectionate. 

The breed has litters of varied sizes, much like other dog breeds. Usually, they give birth to between one and sixteen pups, with an average litter size of eight.

As per Guinness, the astounding world record for the largest litter is held by a Neapolitan Mastiff in the UK, who gave birth to a staggering 24 puppies in 2004.

If You want to Check Other dogs size and comparison: Read Our Guide On All Dog Size & Comparison

Neapolitan Mastiff Size Comparison to Human

Neapolitan Mastiff Size
Neapolitan Mastiff Size Explained: How Big Are They Compared To Others?

It is crucial to consider if acquiring a pet is the right match for you and your family before adoption. You may be confused as to how exactly you can manage this. 

However, it is pretty simple. You just need to simply examine and compare the size of the dog breed you are choosing and yourself.

As we have discussed previously, the Neapolitan Mastiff is a huge and robust dog. With an average weight in the range of 50–68 kg (110–150 lbs) and a height at the withers of 60–76 cm (24–30 in). 

And considering the average human weight to be around 50 – 70 kilogram (132-176 lb) with a height of 159.5 cm (5 ft 2.8 in) – 171 cm (5 ft 7.3 in). 

We can conclude that Neapolitan Mastiff can be heavier and much more potent than the average human. However, they are shorter in height than us.

Most adult humans will be able to control this breed of dog. But will require proper training and caring. As for teenagers and children, it is best if they avoid handling this dog. Also, make sure to not leave your children alone with the dogs.

Neapolitan Mastiff Vs Pitbull Vs Cane Corso Size Comparison

Neapolitan Mastiff Size comparison
Neapolitan Mastiff Size Explained: How Big Are They Compared To Others?

While Cane Corsos typically stand 23 to 27 inches tall and weigh 90 to 120 pounds, Neapolitan Mastiffs are more prominent at 24 to 31 inches and 120 to 200 pounds on average. 

Pitbull, however, is lighter and shorter than the Neapolitan and Cane Corso.

In terms of appearance, the latter two look pretty similar, whereas Neapolitan Mastiff looks more fearsome and intimidating. 

Look at the table below to get a more clear picture of their sizes

Size Neapolitan Mastiff Pitbull Cane Corso 
WeightMale: 130 – 150 pounds, Female: 110 – 130 poundsMale: 35 – 60 pounds, Female: 30 – 50 poundsMale: 99 – 110 pounds, Female: 88 – 99 pounds
HeightMale: 26 – 30 inches, Female: 24 – 27 inchesMale: 18 – 21 inches, Female: 17 – 20 inchesMale: 24 – 28 inches, Female: 23 – 26 inches

Neapolitan Mastiff Vs English Mastiff Vs Bullmastiff Size Comparison

Neapolitan Mastiff Size comparison
Neapolitan Mastiff Size Explained: How Big Are They Compared To Others?

While English mastiffs may weigh up to 230 pounds and have shoulders that measure up to 30 inches, Bullmastiffs that are smaller may still weigh up to 130 pounds and have shoulders that measure 27 inches. 

Although the AKC (American Kennel Club) says that bigger weights are encouraged as long as the dog’s measurements and mobility are suitable, Neapolitan mastiffs can grow to 30 inches and weigh more than 150 pounds. 

In all breeds, ladies are often smaller than males despite being still reasonably huge. Have a look at the table below to understand the comparison better:

Size Neapolitan Mastiff English Mastiff Bullmastiff
WeightMale: 130 – 150 pounds, Female: 110 – 130 poundsMale: 160-230 pounds, Female: 120-170 poundsMale: 110 to 130 pounds, Female: 100 to 120 pounds 
HeightMale: 26 – 30 inches, Female: 24 – 27 inchesMale: 30 inches, Female: 27 inchesMale: 25 to 27 inches, Female: 24 to 26 inches

Neapolitan Mastiff Vs Boerboel Vs Rottweiler Size Comparison

Neapolitan Mastiff Size comparison
Neapolitan Mastiff Size Explained: How Big Are They Compared To Others?

Neapolitan Mastiffs are bigger, often measuring 24 to 30 inches tall and weighing 110 to 150 pounds, compared to Rottweilers, who typically stand 22 to 27 inches tall and weigh 85 to 130 pounds. 

At the same time, the Boerboel and Neapolitan Mastiff are both the same height. Boerboel may weigh 11 kg (or 24 pounds) more than a Neapolitan Mastiff. 

They typically weigh between 110 and 200 pounds and range in height from 22 to 28 inches.

Size Neapolitan Mastiff Boerboel  Rottweiler
WeightMale: 130 – 150 pounds, Female: 110 – 130 poundsMale: 200 pounds, Female: 150 pounds
Male: 95 to 135 pounds, Female: 80 to 100 pounds 

HeightMale: 26 – 30 inches, Female: 24 – 27 inchesMale: 24-27 inches Female: 22-25  inchesMale: 24 to 27 inches, Female: 22 to 25 inches


And that was everything you need to know about the size of the Neapolitan Mastiff. I hope this article was helpful enough and you got something useful from it.

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