Measuring roughly 21 centimetres high and 23 centimetres wide, it is less than the size of a sheet of A4 paper, yet it carries on its face two distinct pieces of early medieval craftsmanship: an incised cross-of-arcs enclosed within a circle, and below it, a single horizontal line of text.

A cross-of-arcs is a form in which the arms of the cross are defined by curved rather than straight lines, giving the design a more fluid, almost interlocking quality. The slab itself is described by scholars Elisabeth Okasha and Katherine Forsyth, writing in 2001, as part of a larger piece of unknown original form, meaning what survives is a fragment of something that was once bigger and whose full shape can no longer be determined. It is catalogued as Toureen Peacaun 28, a designation that places it within a broader corpus of inscribed stones from this part of Tipperary. The inscription beneath the cross has not been expanded upon in available detail, but its presence alongside the carved symbol suggests a commemorative or dedicatory function of the kind common to early Christian stone carving in Ireland, where text and image were used together to mark a person, a prayer, or a place.

The stone is built directly into the interior east wall of the church, which means it is structurally part of the building rather than displayed as a loose artefact. Visitors should look carefully at the wall surface; the incised lines are shallow and the piece is small enough that it rewards close attention rather than a passing glance.