It is easy to overlook: the stone measures only 35 centimetres in length and tapers from 30 centimetres wide at its broadest to less than 20 centimetres at its narrower end. But look closely and the carving reveals itself, an unequal-armed cross enclosed within the remnants of a circle, with forked or bifurcated terminals on both side arms, a T-bar finishing the upper arm, and, at the base, an outwardly curving scroll known as a pelta motif. That bottom pelta is a particularly telling detail, the kind of decorative flourish that connects this modest stone to a wider early Christian tradition along the western end of the Dingle Peninsula.

A church and graveyard survey carried out in 2008 by Buckley and Dunne identified this as the earliest recorded artefact at the Annagh site, and placed its carving as potentially as early as the sixth century AD. The pelta or scroll terminal at the foot of the cross is not unique to Annagh; the same motif appears at Kilshannig, Currauly, Kilmalkedar, and Reask, among other locations in the area, a cluster documented by Cuppage in 1986 that suggests a shared regional carving tradition during the early medieval period. The stone itself appears to have been modified at some point before it was built into its current position in the church wall, an intervention that damaged the outer enclosing circle, though enough of that circle survives to indicate its original form. Whether the modification happened during the construction of the church wall or at an earlier stage is unclear, but the stone's presence here may point to an ecclesiastical foundation at Annagh stretching back to the earliest centuries of Christianity in Ireland.