Brittany Spaniels, or Brittanys depending on where they reside, certainly have their resemblance to other dogs. They behave more like a pointer or a setter, yet the appearance of a spaniel. It comes as no surprise there is much debate surrounding the breed name. But how big does this dog get? What breed does this vibrantly coated dog take after in size? Here is what you need to know.

So, how big do Brittany Spaniels get? Brittany Spaniels typically reach between 17-20″ (43-50 cm) in height and weigh between 30-40 lbs (13-18 kg), on average when fully grown. They generally reach their final size between the ages of 12-16 months, depending on how big they get. Males and females of the breed do not vary much in size.

Brittanys are without a doubt a medium-sized breed. They fit the classification perfectly.

And while they have their similarities with pointers, setters, and the spaniel group, they are unique.

They are smaller in frame and structure than setters but have larger legs than your average spaniel.

What you get is a favorably-sized, sturdy, and enthusiastic dog that was born for an active lifestyle.

This is a breed that will keep you busy.

They simply love being outside and being kept active. Whether physically or mentally.

Let us now take a closer look at the breed’s growth rate in further detail.

This way, you will know exactly what you expect should you decide to bring a young pup home.

We will then move onto what their final size means from an ownership perspective, so be sure to keep reading!

Brittany Spaniel Proportions

Brittany Spaniels are well-built dogs, longed-legged and square in proportion (with height matching the body’s length).

This breed is also known for being light in bone, and adding this to their proportions enables them to be so agile and fast.

So much so that the Brittany is recognized for their ability to move quickly.

They are equally alert and keen to run, should or if given the opportunity.

They can be born tailless or even have it later docked to about 4″ in length.

At What Age Is A Brittany Spaniel Full Grown?

The average Brittany Spaniel will reach their full adult size between 12-16 months, depending on how large they become (with smaller dogs of the breed reaching their final size faster).

Generally, there is little difference in size between males and females.

Nevertheless, let us look at the respective growth rates of Brittany Spaniels for both sexes, from puppy through to maturity.

Growth Of A Male Brittany Spaniel

The weight of a male Brittany Spaniel at 3 months should be between 13 and 16 pounds.
At 6 months, they will likely weigh between 23 and 30 lbs (pounds).
At 1 year, a male Brittany Spaniel should weigh between 30 and 40 lbs (pounds).

Age	Weight – Low Average (lbs)	Weight – High Average (lbs)
3 Months	13	16
4 Months	17	21
5 Months	20	25
6 Months	23	30
7 Months	25	32
8 Months	26	33
9 Months	27	35
10 Months	28	36
11 Months	29	37
12 Months	30	38
13 Months	30	38
14 Months	30	39
15 Months	30	39
16 Months	30	40

Growth Of A Female Brittany Spaniel

The weight of a female Brittany Spaniel at 3 months should be between 13 and 16 lbs (pounds).
At 6 months, they will likely weigh between 23 and 30 lbs (pounds).
At 1 year, a female Brittany Spaniel should weigh between 30 and 38 lbs (pounds).

Age	Weight – Low Average (lbs)	Weight – High Average (lbs)
3 Months	13	16
4 Months	17	21
5 Months	20	25
6 Months	23	30
7 Months	25	32
8 Months	26	33
9 Months	27	35
10 Months	28	36
11 Months	29	37
12 Months	30	38
13 Months	30	38
14 Months	30	39
15 Months	30	39
16 Months	30	40

As the data suggests, there is little variance between the breed; the smallest and the largest are not too dissimilar in weight and size.

For instance, the largest male Brittany Spaniel will likely be only 10 pounds heavier compared to the lightest of the breed.

Spatial Requirements Of Brittany Spaniels

Being medium-sized, the Brittany is an appealing breed to own. They are not too large and cumbersome, and they can easily be transported in the car. Being so agile, they are very versatile too.

But, with this breed, you are going to need a bit more space than you might have originally had thought.

These dogs do not suit nor adapt very well to an apartment or small-living quarters.

And this may come as a surprise.

They’re not a huge dog, after all.

But they are certainly energetic ones.

They simply need sufficient space to stay active.

They’re just not going to lay around all day.

Nor should they.

And this means owners need to be willing and able to keep their dog sufficient attention, busy, and active.

Otherwise, they are likely to suffer from hyperactivity, separation anxiety, and other behavioral disorders when left alone for too long with too little to do.

So, a sufficiently large property with access to outdoor space is a must for this breed.

A fenced yard where this dog can roam and play will serve them well.

Failing this the ability to routinely take them outsides for walks, hikes and other activities.

Exercise And Dietary Needs Of Brittany Spaniels

To keep a Brittany Spaniel at a healthy weight and happy in mind, it’s imperative that they are given sufficient exercise and an appropriate diet.

Let us now take a closer look at what this means for this particular breed:

Exercise

Brittany Spaniels are renowned for their exuberant nature, and as a sporting breed, have quite a lot of energy that needs to be channeled appropriately.

So, it naturally follows that they need plenty of exercise.

1-2 hours per day is considered a minimum.

And this structured exercise should also be broken up over the course of the day, and on top of regular movement and play outside.

Regarding the 1-2 hours, it should include long, somewhat challenging walks (including hikes) and running on a leash.

Some owners even report that they need to run with their Brittany for up to 45 minutes per morning to taper their energy throughout the day.

This appears to be more critical in dogs that are being left at home for some time.

Beyond this, they should be kept mentally stimulated via various games – fetch with a ball is one such way to exercise them in both ways.

Visiting dog parks in the quieter evenings is another useful approach – where a Brittany can be let off the lead to run and explore, yet still, get some socialization with other dogs and people.

Of course, exercise should be given appropriately and per the age of the dog.

Puppy Brittany spaniels should not be over-exercised, and activity should not be too rigorous. It must be appropriately increased, and you must be mindful while they are still growing.

So, it is generally advised to keep running to a minimum