The arrangement is pennanular, meaning almost but not quite circular, open to the south, and spans roughly five metres north to south. Some of the stones appear to sit on slight pedestals of soil and smaller rocks, which suggests either deliberate placement or centuries of gradual subsidence around their bases. What makes the site quietly unsettling is precisely this uncertainty: it has the weight and scale of intention, six boulders averaging around two and a half metres in length, but its age and original purpose remain unresolved.

The word cromleac, or cromlech, is a term of Welsh and Breton origin used historically to describe megalithic structures, often large capstoned chambers, though it was applied loosely across these islands to various ancient stone arrangements. This particular site was recorded on the Ordnance Survey map of 1837 under the spelling Cromleac, and by the 1913 edition the cartographers had shifted to the more anglicised Cromlech. That the name was considered worth marking at all suggests it was already a recognised landmark in the landscape by the nineteenth century, sitting on the southern edge of a gentle rise in rolling pasture close to the shoreline. Whether the structure predates that naming by centuries or millennia is, for now, an open question.