 It had been built using about 50 stones . The barrow is sub @-@ rectangular in plan , and about 20 meters ( 64 feet ) in length . At its broader , eastern end , where the chamber is located , the monument measures 15 metres ( 50 feet ) , while at the narrower , western end , it is 12 metres ( 40 feet ) in breadth . As such , the barrow is a " truncated wedge @-@ shape " . The megalithic builders responsible for the Coldrum Stones positioned it on the top of a small ridge adjacent to the North Downs , and constructed it facing eastward , towards the River Medway . 
 It <a href='been_done' title='1'><mark>had</mark></a> been built using about 50 stones . The barrow <a href='drop_aux' title='2'><mark>is</mark></a>sub @-@ rectangular in plan , and about 20 meters ( 64 feet ) in length . At its broader , eastern end , where the chamber is located , the monument <a href='uninflect' title='3'><mark>measures</mark></a> 15 metres ( 50 feet ) , while at the narrower , western end , it <a href='drop_aux' title='4'><mark>is</mark></a>12 metres ( 40 feet ) in breadth . As such , the barrow <a href='drop_aux' title='5'><mark>is</mark></a>a " truncated wedge @-@ shape " . The megalithic builders responsible for the Coldrum Stones positioned it on the top of a small ridge adjacent to the North Downs , and constructed it facing eastward , towards the River Medway . 
It done been built usin about 50 stones . The barrow sub @-@ rectangular in plan , and abt 20 meters ( 64 feet ) in length . At its broader , eastern end , where the chamber is located , the monument measure 15 metres ( 50 feet ) , while at the narrower , western end , it 12 metres ( 40 feet ) in breadth . As such , the barrow a " truncated wedge @-@ shape " . The megalithic builders responsible for the Coldrum Stones positioned it on the top of a small ridge adjacent to the North Downs , and constructed it facing eastward , towards da River Medway .