It is roughly 2.2 metres long and roughly 65 centimetres on each side, a substantial rectangular mass of stone. What makes it unusual is not its size but its history of use: this block was once a standing stone, one of the upright prehistoric monuments erected across Ireland from the Neolithic period onward, often associated with ceremonial or territorial functions, though their precise purpose remains debated. At some point, it was toppled and pressed into service as building material.

When the Castleisland District Archaeological Survey examined the site in 1987, the stone was already horizontal, forming the upper course of a field boundary. The landowner at the time could recall it standing upright, and placed its original position some 20 to 30 feet, or roughly six to nine metres, to the south of where it now lies. That memory alone is quietly striking: within a single lifetime, a prehistoric monument had been relocated and repurposed. The stone's original socket or setting is recorded separately, a short distance away in the same townland, which means the two records together preserve something of the object's trajectory across the landscape, from its ancient upright position to its current, rather more horizontal existence.