Yorkies typically reach their full-grown size and weight by the time they are around a year old. Like many
small dog breeds , Yorkies tend to mature relatively quickly compared to larger breeds due to their genetics. While they might physically reach their full size within the first year or so of their life, their behavior, temperament, and sometimes even coat development can continue to evolve as they reach the 18-month mark.
It’s important to provide proper nutrition, exercise, and healthcare during their growth stages to ensure they develop into healthy adult dogs. Regular veterinary check-ups can also help monitor their growth and overall well-being.