The enclosure measures roughly 105 metres across its interior on the north-south axis, making it a genuinely substantial monument, comparable in scale to the larger ringforts found across the Irish midlands and west. A ringfort, to use the more familiar term, is typically a circular area enclosed by one or more earthen banks and ditches, and was most commonly used as a defended farmstead during the early medieval period, though enclosures of this size sometimes had more complex functions. Here the defining feature is a low earthen bank accompanied by an external fosse, that is, a ditch running along the outer face of the bank, a pairing that would have given the boundary considerably more presence than it possesses today.

Modern field walls have been built directly over the bank along much of its southern and north-western arc, which partly explains why the monument can be difficult to read as a coherent whole at ground level. A gap in the bank at the south-south-east, roughly 2.9 metres wide and approached by a causeway across the fosse, may represent the original entrance, though this cannot be confirmed with certainty. Inside, the south-western quadrant contains a small field-clearance cairn, a modest pile of stones gathered from the surrounding land during later agricultural use. A low mound of earth and stone lies just to its south, though its purpose remains unidentified. A field boundary running roughly north-north-west to south-south-east cuts across the monument at its northern and eastern edges, further complicating the interior. A reference by Lynch Athy in 1914 suggests the site was noticed by local antiquarians in the early twentieth century, and a separate house site recorded approximately 25 metres to the south indicates that this corner of Oranhill has a layered history of occupation beyond the enclosure itself.