Contemplating the Tibetan Mastiff? Then you’re going to want to know how big this breed typically gets. Besides, if you have seen any pictures of these dogs already – you’ll certainly know that this is not your typical lap dog! Far from it. Intrigued about the breed, I spent some time researching the average size; both in terms of height and weight. I’d like to share what I found here with you today.

So, how big do Tibetan Mastiffs get? Tibetan Mastiffs typically reach between 24-26″ height, weighing between 75 to 160 pounds, on average. Generally, Tibetan Mastiffs will reach their full adult size and frame between 12 to 18 months of age. However, this is not always the case. Tibetan Mastiffs have been known to continue growing slowly until they are five years old. Nevertheless, when they reach their final size, these working dogs are very large.

The Tibetan Mastiff is a primitive dog breed developed centuries ago. You can probably guess where they came from. (spoiler – it’s Tibet!)

This dog was initially bred to work- and due to its sheer size, was primarily used to guard property and livestock. In fact, many still perform this role today.

They have since, however, become more commonly kept as pets. This is due in part to their loving, gentle, patient, and understanding temperament and nature.

They develop strong bonds with their families, and are equally good with children and other dogs.

Beyond just their physicality, these dogs possess a thick long double coat – contributing to their size.

Let us now take a closer look at their size, including whether they are considered the biggest dog in the world.

We’ll also be looking at the kind of space you will need if you are serious about taking one of the gentle giants on.

So, be sure to keep reading to set your expectations and be able to plan accordingly!

How Big Is A Full Grown Tibetan Mastiff?

Tibetan Mastiffs are classified as large dogs, and they are of an intimidating size.

They typically reach 24-26″ in height and weigh 75 to 160 pounds when they stop growing. Like many other dog breeds, males are normally bigger than the females.

Keep in mind that while many owners and vets expect their Tibetan Mastiff to reach their full weight and height by 12 to 18 months, it can take longer for some breed lines.

It’s not uncommon for some Tibetan Mastiff to take a few years to reach their final size.

There are specific factors that do influence their final size, and why we can see a range between dogs.

The main ones include genetics and hereditary (which is influenced by their lineage and the dogs they come from), their general health, and then those that you are responsible for and can influence, such as diet and nutrition.

Either way, this dog breed is majestic in appearance; due to their long coat, beautiful tail, and attractive colors. This dog is a head-turner.

They are also considered to be a real gentle giant around people they know and can trust, especially with their owners.

While equally, they make an excellent guard dog due to their large size, wariness of strangers, and willingness to protect their family.

These dogs are hard workers and will go above and beyond for their humans.

With that said, you must be willing to provide the right environment for such a breed.

You must also consider that they are highly independent with their own minds, obedience training is going to be required to get the best out of them and ensure they listen to your commands.

This is perhaps even more important, when you consider their size.

Furthermore, you must have a well-fenced yard as these dogs like to climb fences to escape.

They should never be left out for long as they will start digging; they have also been known to become aggressive and territorial in these contexts.

Tibetan Mastiffs are small and cute as puppies, but they do need socialization early in life.

Be aware that these dogs need quite a bit of space to accommodate their large size and cannot live in apartments.

Is The Tibetan Mastiff The Biggest Dog In The World?

The Tibetan Mastiff is undoubtedly one of the biggest dogs; however they are not considered to be the biggest dog in the world.

Instead, the biggest appears to be the English Mastiff; which range from 27 to 35 inches in height and weigh between 200 to 230 pounds.

One thing to consider however, is that the term ‘biggest’ can be misleading, as it could refer to height and not the general size.

The current Guinness Record title holder for the tallest dog is a Dane called Freddy, who measures 40.75 inches tall and lives in Leigh-on-sea, Essex, England.

One puppy, an American Molossus, weighed over 180 pounds and measured at 6 feet on her hind legs in March 2018. Perhaps she could be a contender for the largest dog in the future?

So, while the Tibetan Mastiff is not the biggest dog, they are certainly one of them.

Those whom exceed the average can also come pretty close.

And while this may put some off this breed, there are actually many benefits to owning a larger dog.

Ironically, they do tend to be more gentle and patient. They don’t require as much exercise as people think, even though they need a lot of space.

Large dogs often have great restraint while also being protective of their families.

These are all generalizations of course; each dog will have their own temperament and personality. It also depends on how they were bred and raised too.

At What Age Is A Tibetan Mastiff Full Grown?

Tibetan Mastiffs generally reach their full adult size at around 12 to 18 months of age. However, this is just an average and some Tibetan Mastiffs continue to grow more slowly until they reach around the age of five.

Female Tibetans typically reach their full size before males, and for the slower growers, this is usually by 3 to 4 years of age, whereas in males it can take up to 1 to 2 years longer.

Let us now take a closer look at the expected growth rates of this breed:

Typical Growth Of A Male Tibetan Mastiff

The weight of a male Tibetan Mastiff at 3 months will likely be between 33 and 48 pounds.
At 6 months, they will likely weigh between 63 and 91 lbs (pounds).
At 1 year, a male Tibetan Mastiff will likely weigh between 92 and 140 lbs (pounds).

Age	Weight – Low Average (lbs)	Weight – High Average (lbs)
3 Months	33	48
4 Months	44	66
5 Months	52	77
6 Months	63	91
7 Months	66	103
8 Months	74	110
9 Months	81	119
10 Months	85	129
11 Months	88	135
12 Months	92	140
13 Months	94	142
14 Months	95	144
15 Months	95	147
16 Months	95	153
17 Months	96	155
18 Months	98	158

Growth Of A Female Tibetan Mastiff

The weight of a female Tibetan Mastiff at 3 months will likely be between 27 and 40 lbs (pounds).
At 6 months, they will likely weigh between 72 and 73 lbs (pounds).
At 1 year, a female Tibetan Mastiff will likely be weigh between 75 and 78 lbs (pounds).

Age	Weight – Low Average (lbs)	Weight – High Average (lbs)
3 Months	27	40
4 Months	37	51
5 Months	44	63
6 Months	52	73
7 Months	55	85
8 Months	61	89
9 Months	66	94
10 Months	68	102
11 Months	70	107
12 Months