1. Overview of ten-month-old baby development standards In the tenth month of baby growth, they have already acquired many basic skills, such as being able to sit firmly, crawl and stand. Additionally, they will begin to try to walk and become interested in things around them. Next we will introduce in detail the development standards for ten-month-old babies. 2. Physical development 1. Height: The average height of a ten-month-old baby is about 74.3 cm. 2. Weight: average weight is 9.4 kg