It is not a dramatic monolith; at just under one and a half metres tall, it would be easy to walk past. What makes it worth pausing over is the precision of its presence: rectangular in plan, measuring 1.2 metres by 0.6 metres, and orientated along a north-west to south-east axis, a deliberate alignment that recurs across prehistoric standing stones throughout Ireland and Britain, though its exact significance in any individual case remains a matter of ongoing debate.

Standing stones, raised during the Bronze Age in many instances, were erected as single uprights without the surrounding earthworks or chambers of more elaborate monuments. Their purposes are not fully understood; some appear to mark boundaries, trackways, or burial sites, while others may have held astronomical or ceremonial significance. The orientation of the Erneen stone along the north-west to south-east axis is the kind of detail that keeps archaeologists attentive, since such alignments occasionally correspond to solar or lunar events at particular times of year. Whether that is the case here is unknown, but the positioning on a slope overlooking a valley suggests the site was chosen with some awareness of the wider landscape rather than by accident.