It measures roughly seven metres across at its widest, and a single possible grave marker stands to the east. The site is known locally as a children's burial ground, which places it within a particular and sombre tradition of Irish rural life.

These children's burial grounds, known in Irish as cillíní (singular cillín), were used for the interment of unbaptised infants, who were excluded from burial in consecrated Catholic churchyards under ecclesiastical law that persisted well into the twentieth century. Families buried their children instead in marginal spaces, often ancient or liminal ground: old ringforts, the edges of fields, shorelines, or small enclosures like this one. The circular form here, enclosed by an earthen bank, is typical of the type, and may follow the outline of a much older feature in the landscape, reused quietly over generations. The grief attached to these places was generally private, which is partly why so many cillíní survive without formal markers or documentation. At Glasheenaulin, that single possible grave marker to the east is, in that context, more notable than it might first appear.