A kangaroo stands over 6-1/2 feet tall and weighs upward of 200 pounds. To represent a smaller species standing about 4 feet tall and weighing 110 pounds, apply the young simple template or manually reduce the size from Medium to Small. Kangaroos reach maturity in less than a year and can live up to 20 years, but most individuals in the wild are hunted by predators within their first decade.