The magnificent golden-coated Leonberger is, without doubt, charming on the eye, often sporting a lion-like mane around the neck and chest. It comes as no surprise to learn that they were once bred for European royalty. But, how big do they typically get, and what does this all mean for potential owners. Here is what you need to know.

So, how big do Leonbergers get? Leonberger dogs typically reach 27-31″ (70-78cm) in height, weighing between 90-170 lbs. (40-77 kg) when fully grown. They typically reach their final size by 19 months of age, although larger dogs of the breed may stop at around 22 months. Males generally are much larger than females.

Leonbergers are certainly big dogs – a true sight to behold.

It comes as no surprise that the AKC (American Kernel Club) describes this breed as a “lush-coated giant.”

But despite their enormous size, they are known for being very gentle and patient in nature and make great companion dogs.

Perhaps we can rephrase them to ‘big-friendly giants’ or BFGs?

Nonetheless, this is a dog that can vary quite a lot in size. Not so much in height, but certainly in weight.

Average Leonbergers Size

Leonbergers are often described as large and powerful dogs. In fact, they often rank highly in the largest dog breed lists, such as this one.

Here is why:

A male adult Leonberger will typically stand between 28-32 inches in height, weighing between 110-170 pounds.
A female adult Leonberger will typically stand between 25-29 inches in height, weighing between 90-140 pounds.

As you can see, there is quite a variance between males and females of the breed.

But even a smaller female is still a formidable dog.

And a closer look at these measurements and dimensions soon shows that these dogs weigh as much as, if not more than, the average full-grown human.

And this is by design.

A closer look into their lineage and their history provides interesting insight.

They are a working breed by nature, initially used as farm dogs pulling heavy and cumbersome carts.

And such strength, coupled with natural high energy, meant they served in both World Wars to transport heavy ammunition carts.

They’re very strong.

And are surprisingly good swimmers too.

It is no wonder that they are often kept as watchdogs and kept in a working capacity to this day.

But how could a dog be bred to such a size?

Well, the Leonberger is the result of crossbreeding three very large breeds:

Breed	Average Height (Inches)	Average Weight (Pounds)
Newfoundland	26-28″	130-150 lbs.
Saint Bernard	26-30″	20-180 lbs.
Great Pyrenees	25-32″	85-160 lbs.

And a closer look at the sizes of those breeds makes it entirely logical.

In terms of their frame, they possess a longer body than one that is tall.

And there is one further characteristic that adds to their sheer size.

Their coat.

The Leonberger has a water-resistant dense double coat that is either straight or wavy and medium-soft to rough in texture.

At What Age Is A Leonberger Full Grown?

The average Leonberger will reach their full adult size and frame by 18-22 months of age, depending on how large they ultimately become.

Naturally, the larger the Leonberger, the longer it takes for them to reach their final size.

For this reason, males often reach full-grown size maturity faster than the females of the breed.

Let us now take a closer look at what this growth looks like; starting from a the age of a young pup.

Growth Of A Male Leonberger

The weight of a male Leonberger at 3 months should be between 36 and 52 pounds.
At 6 months, they will likely weigh between 68 and 94 lbs (pounds).
At 1 year, a male Leonberger should weigh between 98 and 143 lbs (pounds).

Age	Weight – Low Average (lbs)	Weight – High Average (lbs)
3 Months	36	52
4 Months	48	66
5 Months	55	79
6 Months	68	94
7 Months	72	106
8 Months	79	114
9 Months	88	127
10 Months	92	132
11 Months	95	138
12 Months	98	143
13 Months	100	145
14 Months	103	146
15 Months	104	148
16 Months	106	153
17 Months	107	155
18 Months	109	158
19 Months	110	162
20 Months	110	165
21 Months	110	167
22 Months	110	170

Growth Of A Female Leonberger

The weight of a female Leonberger at 3 months should be between 31 and 42 lbs (pounds).
At 6 months, they will likely weigh between 59 and 77 lbs (pounds).
At 1 year, a female Leonberger should weigh between 84 and 117 lbs (pounds).

Age	Weight – Low Average (lbs)	Weight – High Average (lbs)
3 Months	31	42
4 Months	42	52
5 Months	51	64
6 Months	59	77
7 Months	66	88
8 Months	72	94
9 Months	75	99
10 Months	79	108
11 Months	81	114
12 Months	84	117
13 Months	85	121
14 Months	86	126
15 Months	86	130
16 Months	87	133
17 Months	88	135
18 Months	89	138
19 Months	90	140

And this is just their physical size.

It’s important to remember that there are other aspects of maturity to consider, such as mentally and behaviorally.

Leonbergers are known to fully mentally mature at around 3 years of old.

So, if you do take on a Leonberger; consider that you’ll have a full sized dog that may not exhibit behaviors expected by your average adult dog.

Its also why early training and socialization is critical when owning this breed.

But more on that later. </