Partially swallowed by sod, it measures just over half a metre in length, with a traceable width of roughly 40 centimetres. It bears no inscription, no carving, no decorative motif of any kind. What makes it quietly arresting is precisely this anonymity, a recumbent graveslab, meaning one laid flat over or beside a burial, that marks a grave whose occupant left no legible trace.

The slab sits in the western half of the Saint's graveyard on the island, positioned 16.4 metres from the southern wall and 8.15 metres from the western wall. Those precise measurements come from the work of R.A.S. Macalister, who surveyed and drew a plan of the graveyard in 1916 and 1917. The slab appears on that plan but was not assigned a number, which places it in an ambiguous position even within the documentary record. Inis Cealtra itself has a long ecclesiastical history, associated with early Christian monasticism and drawing visitors and pilgrims for centuries. The Saint's graveyard reflects that layered past, containing monuments of varying age and legibility. This particular slab, undecorated and unnamed, represents the outer edge of what survives and what can be known.