It is not large by the standards of prehistoric monuments, standing 1.65 metres tall and roughly rectangular in cross-section, measuring 0.7 metres by 0.26 metres at its base. What makes it quietly arresting is its deliberateness: the stone tapers slightly from base to top, suggesting it was shaped or selected with some care, and its orientation runs north to south, a alignment that recurs often enough among Irish standing stones to feel intentional rather than incidental.

Standing stones are among the most common yet least understood prehistoric monument types in Ireland. They appear across the landscape from the Neolithic period onward, though many date to the Bronze Age, and their original purposes remain genuinely uncertain. Some are thought to mark boundaries, routeways, or burials; others may have had ceremonial or astronomical functions. The Killeennagallive example is of limestone, the dominant bedrock geology across much of Tipperary, and its surface carries the weathering accumulated over a very long exposure to the elements. Beyond that, the record is spare. No associated features are documented, and no excavation findings are attached to it. It stands in pasture, doing what standing stones do, which is to occupy space in a way that insists on being noticed without explaining itself.