 Monument 23 is sculpted from <unk> and falls in the middle of the size range for confirmed colossal heads . It stands 1 @.@ 84 metres ( 6 @.@ 0 ft ) high and measures 1 @.@ 2 metres ( 3 @.@ 9 ft ) wide by 1 @.@ 56 metres ( 5 @.@ 1 ft ) deep . Like the examples from the <unk> <unk> , the monument features a flat back . Lee Parsons contests John Graham 's identification of Monument 23 as a re @-@ carved colossal head ; he views the side ornaments , identified by Graham as ears , as rather the <unk> eyes of an open @-@ <unk> monster <unk> upwards . <unk> this , James Porter has claimed that the re @-@ carving of the face of a colossal head into a niche figure is clearly evident . 
