When Do Maine Coons Stop Growing? Tips and Facts

Welcome to our comprehensive guide on Maine Coon cats! If you’re a cat lover, chances are you have heard about the majestic Maine Coon breed. These intelligent and stunningly beautiful cats are known for their large size and friendly personalities. In this article, we will explore a specific aspect of Maine Coon cats: their growth and when they reach full maturity. Understanding this information is crucial for any Maine Coon owner or potential adopter.

As we delve into this topic, we will provide valuable insights into the growth stages of Maine Coon cats. We will discuss their size and weight at different ages, offering a growth chart by age to help you gauge their development accurately. Through visual cues in growth pictures, you will gain a better understanding of how Maine Coons typically grow and mature over time.

One prominent question that arises when considering Maine Coon growth is: when do they reach full maturity? In this article, we will address this query, taking into account the differences between male and female Maine Coons. We will explore the average age at which Maine Coons stop growing and reach their adult size, providing a comparison with growth chart data.

Understanding the Growth Stages of Maine Coon Cats

As Maine Coon cats develop from adorable kittens to majestic adults, they go through distinct growth stages. It’s fascinating to observe their transformation and understand how their size and weight change over time. In this section, we will delve into the different growth stages that Maine Coon cats go through, providing valuable insights into their development.

The Growth Chart: Tracking Size and Weight

  • From birth to 5 weeks: Maine Coon kittens experience remarkable growth during their first few weeks. They typically double their birth weight within the first week and continue to gain weight rapidly.
  • 5 weeks to 5 months: During this stage, Maine Coon kittens continue to grow at a steady pace. Their size and weight increase significantly each month, showing remarkable progress.
  • 5 months to 1 year: As Maine Coon cats transition from adolescence to adulthood, their growth rate slows down. However, they still experience noticeable growth during this stage.
  • 1 year onwards: Maine Coon cats are considered fully grown by the age of 3 to 4 years. While their growth rate stabilizes, they may continue to gain weight gradually until they reach their optimal size.

To provide a visual reference, here is a growth chart by age for Maine Coon cats:

AgeWeight (Female)Weight (Male)
1 month1-2 pounds1-2 pounds
3 months3-5 pounds3-6 pounds
6 months7-10 pounds9-14 pounds
1 year8-12 pounds12-18 pounds
2 years9-13 pounds15-25 pounds
3 years9-13 pounds15-25 pounds
When Do Maine Coons Stop Growing?

When Do Maine Coons Reach Full Maturity?

Understanding the timeline for a Maine Coon cat’s growth and knowing when they reach full maturity is essential for pet owners. While individual cats may vary, there are general trends to consider when gauging their growth.

In terms of age, Maine Coons are considered fully grown between 3 to 5 years old. This period allows for their bones, muscles, and overall body structure to develop and reach their maximum potential. It’s important to note that males and females may have slight variations in growth patterns.

A Maine Coon growth chart can provide useful information to track their progress. Let’s take a closer look at the average sizes of male and female Maine Coons when fully grown:

Male Maine Coon12-18 pounds (5.4-8.2 kg) or more
Female Maine Coon8-14 pounds (3.6-6.4 kg) or more

As you can see, male Maine Coons tend to be larger than their female counterparts. However, it’s important to remember that these figures are averages, and individual cats can vary in size, especially if they have different genetics or health conditions.

Observing your Maine Coon’s growth and regularly consulting with your veterinarian can help ensure that they are developing properly. Monitoring their weight, body structure, and overall health can provide valuable insights into their growth process.


Throughout this article, we have explored the growth stages of Maine Coon cats and discussed when they reach full maturity. By understanding these aspects, potential owners can make informed decisions and provide the best care for their feline companions.

We have established that Maine Coons go through distinct growth stages, with their size and weight varying at different ages. We have provided a growth chart by age and shared growth pictures to help visualize their development over time. This information can assist in assessing the growth of your Maine Coon and ensuring they are healthy and thriving.

Furthermore, we have answered the question of when Maine Coons reach full maturity. Taking into account the differences between males and females, we have highlighted the average age at which they stop growing. Additionally, we have discussed the factors that contribute to their potential size, emphasizing the importance of genetics and proper nutrition.

In conclusion, understanding the growth stages, maturity timeline, and potential size of Maine Coon cats is essential for anyone considering adopting or caring for these magnificent felines. By being aware of these factors, owners can provide the appropriate care, space, and resources necessary for their Maine Coon’s well-being, allowing them to thrive and enjoy a happy and healthy life


Q: When do Maine Coons stop growing?

A: Maine Coons typically stop growing around 4 years old, but some may continue to slowly grow until they are 5 years old.

Q: How big can Maine Coon cats get?

A: Maine Coon cats are one of the largest domestic cat breeds and can reach up to 40 inches long from nose to tail.

Q: Do Maine Coon cats grow slowly?

A: Yes, Maine Coon cats tend to grow at a slower rate compared to other breeds, reaching their full size over a period of 4-5 years.

Q: What is the average size of a female Maine Coon?

A: Female Maine Coons usually reach an average size of around 2 years of age, with their full-grown size being slightly smaller than male Maine Coons.

Q: Are Maine Coons considered a big breed?

A: Yes, Maine Coons are known for their large size compared to other cat breeds, earning them the title of one of the biggest domestic cat breeds.

Q: How does the size of Maine Coons compare to other breeds?

A: Maine Coons are known for their long hair and can reach sizes of up to 40 inches long, making them significantly larger than the average house cat.

Q: Why do Maine Coons keep growing longer than other breeds?

A: Maine Coons have a tendency to continue growing slowly until they reach their full size due to their genetic makeup as a breed of cat that tends to grow larger than typical domestic cats.