Measuring roughly nine centimetres high and thirteen centimetres wide, it preserves just enough of its original surface to be legible as something deliberate: a fragment of an outline cross, the corner of what was once a cross-arm, and, above it, a single carved letter.

Scholars Elisabeth Okasha and Katherine Forsyth catalogued the stone in 2001, listing it as Toureen Peacaun 12 among the early medieval inscribed stones of the region. They describe it as a fragment of a slab of unknown original form, meaning whatever larger object it once belonged to, a grave marker, a decorative panel, or something else entirely, has long since been lost or broken away. What survives has been set into the church wall, visible on the interior east side, incorporated rather than stored away or discarded. That single letter above the cross fragment is particularly tantalising: it cannot be read in isolation, stripped of the rest of the inscription it once belonged to, yet it confirms that this was a literate object, made in an environment where writing on stone carried meaning and intention. Early medieval Irish churches produced a considerable number of such inscribed slabs, often marking graves or commemorating founders and patrons, though without the surrounding text this particular example resists any firm interpretation.