From head to tail , Torosaurus is thought to have measured about 8 to 9 m ( 26.2 to 29.5 ft ) long .
From head to tail , Torosaurus is weighed four to six tonnes .
From head to tail , Torosaurus is thought to have measured about 8 to 9 m ( 26.2 to 29.5 ft ) long and weighed four to six tonnes .