Ring barrows are low circular earthen mounds, typically associated with Bronze Age burial, and their surrounding ditches were not usually chosen as settings for upright stones. This one, on the eastern side of the barrow within Castlecor Demesne in north County Cork, measures 1.45 metres in height and roughly one metre by two metres at its base, with a triangular profile both in plan and in cross-section, its long axis oriented northeast to southwest.

The combination of monument types here is what gives the site its quiet interest. Standing stones are among the most ambiguous of Irish prehistoric monuments: they may mark boundaries, burial sites, astronomical alignments, or meeting points, and their relationship to nearby earthworks is rarely straightforward. That this stone was placed specifically within the fosse of an existing barrow, rather than on the mound itself or at some distance from it, suggests a deliberate and considered act, though whether it was contemporary with the barrow's construction or added later is not recorded. The triangular form is also relatively uncommon; most standing stones tend toward more irregular or roughly rectangular outlines, and the regularity of this one's geometry invites curiosity about whether it was shaped by hand or chosen for its natural form.