It stands 1.3 metres tall, roughly 0.8 metres wide and 0.25 metres thick, its shape described as subrectangular in plan, meaning it is broadly rectangular but without perfectly regular edges. Its long axis runs northeast to southwest, an orientation that may or may not be coincidental, though many Irish standing stones show deliberate alignment with solar or landscape features.

Standing stones are among the most enigmatic survivals of prehistoric Ireland. Erected most commonly during the Bronze Age, though some may be earlier or later, they appear singly or in loose groupings across the Irish countryside, and their original purpose remains genuinely uncertain. Some are thought to mark boundaries, routeways, or burial sites; others may have served ceremonial or astronomical functions. What is clear is that the effort involved in quarrying, transporting, and raising even a modest stone was considerable, which suggests that wherever one stands, it stood for a reason that mattered to the people who put it there. The name An Screathan Mór, meaning roughly the large stony place or large scree in Irish, hints at the character of the terrain, a landscape shaped as much by rock as by soil.