When Do Kittens Stop Growing Tabby. 12 24 months would be the average age cats stop growing size isn t a good indication of age it can depend on genetics and the start kitten has in life. Most cats continue to grow until around the 1 year mark.

Kittens grow rapidly until 6 months old. These last two months are important because the cat is going to essentially be fully grown. Eleven months to twelve months old your kitten has grown into a beautiful adult cat at this point.
The vet says i have two very healthy kitties but i am curious to know if they will every get bigger.
Nicole fulcher assistant director of the animal medical center of mid america although they still may have some filling out to do. The vet says i have two very healthy kitties but i am curious to know if they will every get bigger. This doesn t necessarily mean that cats over a year old will stop growing altogether. Most experts agree that the answer to when do cats stop being kittens is about one year.