Trapezoidal in shape, Julliberrie's Grave is oriented on a north-northwest to south-southeast orientation. As of the mid-1930s, the barrow measured 43.9 metres (144 feet) in length, with a width of 14.6 metres (48 feet) at its northern end and 12.8 metres (42 feet) at its southern end. The tumulus measured 2.1 metres (7 feet) at its highest point. The long barrow was once larger than this; a letter written by an antiquarian in 1703 reported that the barrow was over 54.8 metres (180 feet) in length and over 12.1 metres (40 feet) in width at its widest section.