It is not much to look at by conventional measure: roughly 38 centimetres tall above the soil, 26 centimetres wide, and only a few centimetres thick. But the person or persons who shaped it long ago cut a concave notch into each of its sides, then worked the stone above those notches into a roughly rounded head. The result is one of the earliest forms of Christian memorial marker found in Ireland, a cross-slab, where the outline of the cross is suggested by the shaped silhouette of the stone itself rather than by any incised decoration.

The slab sits within a graveyard associated with an early monastic foundation at the south-eastern end of Inishbofin, a community that belongs to the period when island and coastal sites across the Irish world were favoured as places of retreat and devotion. Cross-slabs of this kind, small and often irregular, are among the most modest survivals of early medieval Christianity in Ireland, and their simplicity is part of what makes them significant. This particular stone, recorded by Higgins in 1987, is orientated with its broad faces to the east and west, an alignment consistent with early Christian burial practice. A second slab of similar character exists elsewhere in the same graveyard, suggesting the site preserves more than one such marker from what was clearly a sustained period of religious activity.