What makes it quietly odd is how much it has shrunk, at least on paper. The 1839 edition of the Ordnance Survey six-inch map recorded an enclosure measuring roughly 35 metres north to south and 20 metres east to west. By the 1924 edition, the same feature had been reduced to a shape barely half that size, around 17 by 14 metres. The difference is not a cartographic mystery but a physical one: a north-south field bank cut across the eastern side, effectively truncating the original enclosure and absorbing part of it into the working agricultural landscape.

An embanked enclosure of this kind, a roughly defined area enclosed by a raised earthen bank rather than a wall or ditch, is a form that appears at various points in Irish prehistory and the early medieval period, though without excavation it is rarely possible to say which. This particular example is defined by an earthen bank along its southern, western, and northern arc, between three metres wide and varying in height from 0.4 to 1.2 metres, with a straight stone-faced field bank forming the eastern edge. There is no visible fosse, the term for the ditch that typically accompanies an earthen bank and from which the bank material was usually dug, and no discernible entrance survives. The site occupies a slight natural rise, with higher ground roughly 200 metres to the north and further ground rising to the south-west, which suggests at least some attention was paid to topography when the enclosure was first laid out.