It measures roughly eight metres north to south and four and a half metres east to west, rising only about seventy centimetres above the surrounding ground. Along its eastern edge, traces of what may be a stone revetment, a retaining face of fitted stone used to hold an earthen structure in shape, are still faintly visible.

In 1933, a researcher named Mac Domhnaill recorded the mound in the Topographical Files of the National Museum of Ireland, describing it simply as a "grave mound". That label carries weight without resolving much. Grave mounds of various periods and traditions appear across Ireland, and without excavation it is rarely possible to say whether a given example is prehistoric, early medieval, or something else entirely. What is clear is that this particular mound, in the townland of Ceathrú An Lisín near the centre of Inis Meáin, was considered significant enough to note, and that the irregular combination of earth and stone beneath the grass hints at deliberate construction rather than natural accumulation.