When Do Siamese Cats Stop Growing?

A common question for anyone considering adopting a Siamese cat is, “When do they stop growing?” 

Siamese cats tend to reach their adult size around 12 months old.
Each cat is different, and some may grow for several months or even years after they are mature just like my blue point Siamese cat, Batman.

Siamese cats are long and slender, so you may wonder how big they can get. 

Many factors come into play in determining their growth patterns. In this article, we’ll look at some factors that influence a Siamese cat’s growth. I’ll also discuss when it’s normal for a Siamese cat to stop growing.

How big do Siamese cats get?

Siamese comes in a variety of sizes. While most Siamese cats are in the smaller size, there is actually a lot of range in their size. Some Siamese cats can be small, while others can be quite large. So how big do Siamese cats get?

On average, Siamese cats weigh between 8 and 12 pounds. Others can weigh as much as 20 pounds. The average Siamese cat is about 20 inches long, but some can be as long as 30 inches. 

In general, though, Siamese cats are a moderate-sized breed. They’re not the biggest cats out there, but they’re also not the smallest.

Your Siamese cat’s size will depend on various factors. These include their diet, exercise routine, and genetics. You may not be able to control all these factors, but you can help ensure that your cat remains healthy and reaches her full potential. You can do this by providing it with a nutritious diet and plenty of opportunities to exercise. 

I had always wanted a cat. My parents said they would only allow me to get one if it was small, so it wouldn’t be too much work for them. 

I found this perfect Siamese kitten at the local animal shelter and knew right away that she would be mine. She was tiny, though – about half the size of a regular cat. I knew it would take some time before she grew up to be big enough for me to take home. 

At what age do Siamese cats reach full size? 

On average, Siamese cats reach full adult size at around 12 months old. Of course, that doesn’t mean your cat won’t continue to change and develop. They may put on a bit of weight, or their muscle mass may increase. Some cats can keep growing until they are five or older. 

I was sitting in my chair, watching my Siamese cat. I had lived with him for years and never knew he could grow up so fast. 

He was such a little thing when I first got him, but now he was a full-grown cat with his own personality and habits. He would always come to me when he needed something, and he loved to sleep on my lap while we watched TV together. It felt like time had stopped for us both when we were together like this, but before I knew it, he had grown up!

I couldn’t believe it when he started walking on his own accord. He’s exploring everything around him for the first time in his life. Now I could see him getting older every day without being able to do anything about it. 

How fast do Siamese cats grow? 

Siamese kittens are born very small, weighing in at around 3 ounces. They grow fast during their first few weeks of life, gaining up to 2 ounces per week. By the time they are 8 weeks old, they can weigh between 4 and 5 pounds. After 8 weeks, their growth starts to slow down. They usually reach their full adult size by the time they are a year old. 

What factors affect a Siamese cat’s growth? 

Some general things that may affect a Siamese cat’s growth are diet, exercise, and environment. 

Diet. A good diet will give them the nutrients they need to grow and develop. A Siamese cat’s diet should include plenty of protein and vitamins. These ingredients help promote healthy bones and tissues. This will help them maintain a healthy weight and avoid obesity-related health problems. 

Exercise. They need to be active to stay healthy. This means they should have access to an outdoor space where they can run around and play. You can also keep them entertained with toys that help them spend energy. 

I have two Siamese cats, Batman and Robyn. They are both very friendly and love playing, but they need some time to themselves too. 

Batman is always chasing after Robyn’s tail or running around the house. He always chases after toys that she sees Robyn playing with outside. They need to be active to stay healthy and happy. That’s why I ensure they have access to an outdoor space where they can run around and play. 

Environment. The air quality in their home should be good enough for them to breathe without problems. Additionally, their surroundings should be warm and inviting. This way, they will feel at home – not cooped up in an enclosed space like a cage. 

Never leave them alone for too long. They need interaction and stimulation to stay mentally and physically healthy. 

How can you tell if your cat is still growing?

You can usually tell if your cat is still growing by looking for some simple signs. 

  1. One sign that your cat is still growing is if its fur appears thicker and fuller than usual. This indicates that they are getting more oxygen and nutrition. This helps them grow taller and stronger. 
  1. Another sign is if their tails seem to be getting longer. This indicates that they’re using their tail for balance and locomotion. This is important for movement and growth. 
  1. Other things you can look for include:
  • increased appetite and activity levels
  • elongated limbs and nails
  • enlarged pupils (which means better visual reception)
  • larger teeth (which shows better dental health). 

It is up to you to check your cat, so you can determine when they’ve hit their full growth potential. 


It is normal for a Siamese cat to stop growing after they reach adulthood. The length of time your cat can continue growing depends on several factors.

I hope this article has helped answer some of your questions about when a Siamese cat stops growing. Thanks for reading!

We gathered all the health tips tailored toward maintaining your Siamese cat’s optimal well-being. Check it out here: Siamese Cat Health: A Complete Guide

Get your FREE Siamese Cat 2024 Printable Calendar


You may also like