I've heard humans stop growing around age 18-24. What about cats? When do they stop growing in height?

2 Answers 2


There are a couple of growth periods for cats. The first takes about 4 months and takes them into the kitten stage. The second growth period of a kitten takes them from about 4 months to somewhere between 8 and 12 months to adult size depending on the size of the breed. Larger breeds will take longer to reach their adult size versus smaller breeds, but despite having adult size, they're still junior cats, they don't really become adult cats until their 3rd year.

I only mention the two growth stages (which are effectively continuous) because the dietary requirements change.

  • Wow, thanks! Does this mean that, even though they might be finished growing by a certiain year, their bodies could still be developing until about the 3rd year?
    – Dioxin
    Aug 16, 2014 at 15:09
  • 3
    @VinceEmigh - If you're talking about development of physical skills and coordination in conjunction with mental, then yes, they're still developing after that 1st year as juvenile.
    – Joanne C
    Aug 16, 2014 at 17:38

Usually, around their first birthday is the tallest/longest they will get. Some breeds, their skeleton keeps growing a little bit longer, some stop growing a little bit earlier. But "one year" is the average time for complete skeletal growth.

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