Dromaeosaurids were small to medium-sized dinosaurs , ranging from about 0.7 metres ( 2.3 ft ) in length ( in the case of Mahakala ) to over 6 metres ( 20 ft ) ( in Utahraptor and Achillobator ) .
Dromaeosaurs were small to medium-sized dinosaurs , ranging from about 0.7 meters in length ( 2.3 ft , in the case of Mahakala ) to over 6m ( 20 ft , in Utahraptor and Achillobator ) .