The site has no enclosing wall, no gate, no formal boundary of any kind, which places it in a long tradition of marginal burial in Ireland. These grounds, known variously as cillíní or childrens' burying grounds, were used for infants who died before baptism, and sometimes for others considered outside the boundaries of consecrated ground. Because the Catholic church historically denied such individuals burial in parish cemeteries, families carried them quietly to liminal spaces, often at the edges of fields, beside old raths, or on ground already felt to have some ancient or sacred quality.

The ground at Birmingham Demesne stretches roughly thirty metres north to south and thirteen and a half metres east to west, its irregular shape suggesting it grew gradually over time rather than being planned as a formal space. The small stones set into the earth indicate individual graves, oriented southeast to northwest, a slight variation on the more typical east-west Christian alignment. In the western part of the site, a number of these markers have been obscured by field clearance, the slow accumulation of stones moved from surrounding farmland and heaped where the ground was already given over to the dead. It is a common fate for sites of this kind, which were rarely maintained with the care afforded to parish graveyards and were often absorbed, incrementally, into the working landscape around them.

The stones that remain visible are small and uninscribed, as is typical of cillíní across Ireland, where the absence of a name on a marker was as much a part of the burial practice as the choice of location. There are no monuments here in the conventional sense, only a density of stones on a low rise that a passing walker might not immediately read as a place of burial at all.