What is the size of tigers? Tigers, being the largest cat species on the planet, vary in size depending on their subspecies. Amur tigers, also known as Siberian tigers, hold the distinction of being the largest among tigers. Adult males of this subspecies can reach weights of up to 660 pounds and measure up to 10 feet in length from nose to tail tip. Conversely, Sumatran … [Read more...] about Just How Big are Tigers? What Does Tiger Poop Look Like? And More Tiger Facts