Cavalier King Charles Spaniel Size Guide: How Big Do Cavaliers Get?

Meet the perfect lapdog! Both the Cavalier King Charles Spaniel size and personality make them one of the most amazing companions. Their playful and affectionate attitude, small yet sturdy size, and cuddly nature has made them one of the most popular dog breeds. 

Our handy interactive puppy growth chart and calculator takes all the hard work out of predicting your puppy’s potential adult size. This helps you to know exactly what you are in for.

In this article we’re going to cover everything about the Cavalier King Charles Spaniel size and growth patterns. Also, you can try out our Cavalier King Charles Spaniel growth calculator and size chart to predict a puppy’s full-grown size. Let’s dive into it!

Cavalier King Charles Spaniel By Age Predictions

Cavalier King Charles Spaniel is an adorable dog with qualities that are desirable for many people. They’re very loving, fun, and playful. And thanks to their small size, they don’t require too much space, making them the perfect dogs for people living in apartments or families who would enjoy an affectionate companion.

Even though Cavalier King Charles Spaniel is considered a toy breed by the AKC, they’re on the larger end of the scale. But how big do Cavalier King Charles Spaniels get? Cavalier King Charles Spaniel’s full-grown size ranges around 13-18 pounds in weight and between 12-13 inches in height.

Having said this, it’s important your puppy gets the right amount of food while growing up. Over or underfeeding your dog can have lasting effects on their health. Furthermore, your pup’s energy and nutrient requirements are based on their estimated full-grown size; another reason for you to be prepared and know what to expect! 

Here you can learn more about how much you should feed your puppy. 

Luckily, there are a few ways how you can guesstimate your Cavalier King Charles Spaniel adult size. We’ll dive into it in a moment. But first, let’s have a look at the different sizes of the breed. 

Are there different sizes of Cavalier King Charles Spaniel?

Like with many other dogs, male Cavalier King Charles Spaniels can be a little bit bigger than female pups. Male pups are usually taller and a few pounds heavier. 

Did you know that there’s also a separate breed called English Toy Spaniel? Fun fact: another name for that breed is King Charles Spaniel, which can make things a bit confusing. The average size of Cavalier King Charles Spaniel is 13-16 pounds in weight and 12-13 inches in height. The English Toy Spaniel is a bit smaller dog, typically weighing between 8-14 pounds and standing 9-10 inches tall. 

Additionally, you may have heard about Teacup aka Miniature Cavalier King Charles Spaniels. They have just as much cuteness and personality as the average Cavalier King Charles Spaniel, but in a much concentrated, tinier form. 

Miniature Cavalier King Charles Spaniel’s size is usually between 5-10 inches in height and they weigh less than 10 pounds. However, it’s important to note that not all breeders do their jobs ethically. Some Teacup Cavs might have the dwarfism gene, or have been bred from runts.

Unfortunately, dwarfism puts pups at a risk of health issues like spinal abnormalities, underdeveloped muscles, heart or cranial problems, and more. Likewise, runts are puppies who are unusually small compared to others. Thus, they are more prone to health problems like having a weakened immune system or heart problems. 

If you’ve decided to adopt a pup from a breeder, be sure to read our article about choosing a responsible breeder. 

Cavalier King Charles Spaniel Size Charts & Growth Patterns

Like most dogs, Cavalier King Charles Spaniels will grow most rapidly in the first 6 months of their life. During that time, you can expect your pup to gain weight and grow taller very quickly. In the upcoming months, they will continue to grow, but at a slower pace. 

Typically, you can expect your Cavalier King Charles to reach their adult height at around 8 to 10 months old. However, your pup will still be gaining some weight to round up and gain some girth. Usually, by the time they turn 1 year old, they have reached their full size. On the other hand, some pups do continue growing up to 15 months of age. 

Here’s a typical Cavalier King Charles Spaniel size chart by age:

Age	1-3 months	4-7 months	8-10 months	10-12 months
Height	5-7 inches	7-9 inches	10-12 inches	12-13 inches
Weight	2-7 lbs	4-9 lbs	8-13 lbs	13-18 lbs

*A dog’s height is measured from the withers, the highest part of their shoulder blades.

You can predict Cavalier King Charles Spaniel adult size with our interactive puppy growth calculator. Of course, no formula can ever exactly predict your puppy’s full-grown size. However, it can be used as a helpful tool in determining your pup’s dietary and living requirements. 

You can also roughly calculate your pup’s full-grown size by dividing your puppy’s weight at 12 weeks old with their age in weeks, and then multiplying it by 52. Another formula is to weigh them at 8 weeks and multiply it by 4. 

How big is a full grown Cavalier King Charles Spaniel?

An average full-grown Cavalier King Charles Spaniel’s size is usually 12 to 13 inches tall at the withers and they weigh around 13 to 18 pounds. Teacup Cavs typically weigh less than 10 pounds.

A different formula you could use is:

1. Growth = current weight / current age in weeks
2. Adult weight = Growth x 52 (number of weeks in one year)

So, for example, if your 12-week old pup weighs 18 pounds. You simply divide the current weight by their age in weeks and multiply the result with 52:

Thanks to its small size, Cavalier King Charles does not need much space and can very comfortably live in an apartment. However, as with any other dog, they still require regular exercise, playtime, and a safe living environment.

If you’re a proud Cavalier King Charles pup owner and would like to know how big your furry little friend will be in a year’s time, try out our Cavalier King Charles size calculator and puppy growth chart! 

Is Cavalier King Charles small or medium?

The AKC lists Cavalier King Charles Spaniel as a toy breed. However, they are bigger than other toy breeds like Chihuahua or Maltese. Although Cavalier King Charles Spaniel is one of the largest out of the toy breeds, they are still small dogs who you can easily pick up and bring almost anywhere. 

We hope you found our Cavalier King Charles’ size guide and puppy growth calculator helpful. Cavalier King Charles Spaniels are wonderful dogs with great personalities. Expanding your family with a little pup like this will surely bring lots of love and joy to your everyday life.