House report: Hillary Clinton was âjust wrongâ on Benghazi. John Hayward Follow @@Doc_0 | Wednesday Apr 24, 2013 4:37 PM.
Kittens typically reach a length and weight close to their full-grown size by 9 to 12 months of age. After the 1-year mark, most cats continue to grow at a much slower rate until at least 18 months of age. Large breeds, such as Maine coon cats, typically take even longer to grow to their full size. These cats may not be fully grown until they reach 2 to 4 years of age.
All these and more are signs that your little kitten is growing up: An unspayed female cat typically reaches sexual maturity at around six months of age, although Oriental breeds such as Siamese cats can have their first heat as early as 5 months, while Persians may be 10 months old before they become sexually mature.