In general, however, Siberian tigers experience rapid growth during their first year of life. During this time, they can gain as much as 2-3 pounds per day. By the time they are about 9-12 months old, male Siberian tigers can reach their full size, which is typically between 8-10 feet long and weigh around 500-600 pounds. Females, which are generally smaller than males, usually reach their full size around 2-3 years of age. They are typically between 7-8 feet long and weigh about 300-400 pounds.
Siberian tigers typically reach sexual maturity between the ages of 3-5 years for males and around 4-5 years for females. Their growth rate will gradually slow down at this stage, becoming similar to that of an adult tiger. The life expectancy of a Siberian tiger in the wild is typically around 10-15 years, while in captivity they can live up to 18-20 years.