Cats generally stop growing between 12 and 18 months of age, but this can vary based on sex, breed, and individual factors. Female cats usually finish growing earlier, around 10 to 12 months, while male cats may continue growing until closer to 18 months
. Larger breeds such as Maine Coons and Norwegian Forest Cats can keep growing for longer, sometimes up to 2 years or even as late as 3-5 years in some cases
. Smaller breeds may stop growing sooner, sometimes by 9 months
. Growth is influenced by genetics, diet, and whether the cat is spayed or neutered, as these factors affect the closing of growth plates in their bones
. In summary:
- Most cats: 12–18 months
- Females: 10–12 months
- Males: up to 18 months or slightly longer
- Large breeds: up to 2–4 years or more
After growth stops, cats may gain weight or muscle bulk but no longer increase significantly in height or length
