when are cats fully grown

Cats are typically considered fully grown between 12 and 18 months of age, though this can vary depending on factors such as sex, breed, and whether they have been spayed or neutered. Female cats usually finish growing around 10 to 12 months old, while males often grow until closer to 18 months. Larger breeds like Maine Coons can keep growing for up to 2 years or even longer. Generally, most cats reach their full height and length by about one year, but they may continue to fill out and gain muscle mass until around 18 months or sometimes up to two years. After this period, they have essentially reached their adult size and body condition.