At its broken end, a partial arc suggests the stone was once larger, its full pattern now lost. The carving belongs to a category known as Rathdown slabs, a distinctive group of early medieval grave markers found almost exclusively in the coastal parishes of south County Dublin and north County Wicklow, characterised by incised geometric ornament that sets them apart from the plainer grave markers common elsewhere in Ireland.

The slab was found in 2004 in the south-western quadrant of the graveyard at St. Nahi's, and is recorded in Kathleen Swords's 2009 catalogue of the site. It measures 0.70 metres in length, 0.44 metres in width, and 0.15 metres in thickness, making it a substantial if incomplete piece. Rathdown slabs are generally associated with the early Christian period, and their recurring motifs, circles, crosses, and radiating lines, point to a local tradition of memorial carving that flourished in this part of Leinster. The concentric circle design on this particular example is among the more visually coherent of the group, despite the damage at the broken end. The record was compiled by archaeologist Geraldine Stout.

St. Nahi's church stands in what is now a busy suburban part of Dublin, but the graveyard retains a sense of considerable age. The slab is kept inside the church building rather than left outdoors, which has helped preserve the clarity of its carved surface. Visitors should look for the carved detail carefully; the incised lines are shallow and can be easy to miss in low light. The church is a Church of Ireland parish, so access to the interior may depend on opening hours or arranged visits, and it is worth checking locally before making the trip.