How tall was Dimetrodon?
Dimetrodon
6 to 15ft
Dimetrodon was a quadrupedal, sail-backed synapsid. Most Dimetrodon species ranged in length from 1.7 to 4.6 metres (6 to 15ft) and are estimated to have weighed between 28 and 250 kilograms (60 and 550lb).[6] The largest known species of Dimetrodon is D.angelensis at 4.6 metres (15ft) and the smallest is D.teutonis at 60 centimetres (24in).[7][8] The larger species of Dimetrodon were among the largest predators of the Early Permian, although the closely related Tappenosaurus, known from skeletal fragments in slightly younger rocks, may have been even larger at an estimated 5.5 metres (18ft) in total body length.[9][10] Although some Dimetrodon species could grow very large, many juvenile specimens are known.[11]