This double form is what sets them apart from the more familiar solitary ring barrow, a prehistoric funerary monument typically consisting of a circular mound surrounded by a ditch. Here, two dome-shaped mounds are conjoined along an axis running roughly north-northeast to south-southwest, stretching 22.5 metres from end to end, with a distinct saddle of lower ground between their summits. They are part of a larger barrow-cemetery of seven mounds, six of which remain visible above ground, making this a genuinely unusual concentration of prehistoric burial monuments in the Irish midlands.

A survey carried out in 2015 by David McGuinness produced the most detailed account of the conjoined pair. The northern mound is the broader and taller of the two, measuring 13.5 metres in diameter and rising 3.1 metres above the line of a ditch on its western side. The southern mound is slightly smaller, with a diameter of 11 metres and a height of 2.6 metres above the same reference line. Between them, the saddle at its lowest point still rises 2.2 metres above that western ditch line, suggesting how substantial these earthworks remain. The question of whether a surrounding ditch ever existed has itself proved contentious: an earlier field inspection from 1981 recorded no trace of any fosse, the term used for the ditches that typically encircle ring barrows, while later aerial photography and site plans suggested discontinuous remains of one are present, better seen from above than on foot. Poaching on the eastern side of the southern mound has exposed its interior, revealing it to be composed of very stony earth. The site has been protected under a preservation order since 1979.

The drone photography associated with this site, taken by Peter Nagy, captures something that ground-level observation cannot easily convey: the subtle but unmistakable double-lobed form of the conjoined mounds, lying quietly in the agricultural landscape of Lakill and Moortown. The surrounding fields make it easy to underestimate how much survives. The ditch, where it exists at all, is shallow and discontinuous, the kind of feature that asks for patience and the right angle of light.