What makes the stone at Cullomane worth a second look is its relationship to the ground around it. Set on a natural rise in pasture, it is a rectangular block just over a metre tall, oriented along an east-west axis, and it does not stand entirely alone. Roughly sixty metres to the south-west lies a five-stone circle, a monument type particular to the Cork and Kerry region in which four upright stones flank a recumbent, or horizontal, stone to create a low, compact ceremonial enclosure. The proximity of the two monuments suggests this was a considered landscape, deliberately arranged rather than incidentally accumulated.

The stone was recorded and catalogued by Seán Ó Nualláin in 1984, as part of his systematic survey of standing stones in the region. It measures 1.17 metres in height, with a face roughly 0.85 metres wide and 0.48 metres deep, giving it a solid, blocky presence rather than the tall blade-like profile associated with some other prehistoric uprights. Whether the standing stone and the nearby circle were raised at the same time, or by the same community, is not something the physical evidence settles. In prehistoric Ireland, standing stones served various purposes, from boundary markers to ritual focal points, and their exact function is rarely clear. What is clear is that whoever shaped this particular corner of Cullomane left two monuments close enough together that the connection between them is difficult to dismiss.