At some point after it was made, somebody took it out of its original funerary context and built it into a window frame. The evidence is still visible: three glazing bar-holes cut into the left-hand edge of the stone, the practical marks of a mason who needed building material and used what was available.

The slab itself is a tapering piece of modest dimensions, 1.78 metres long and roughly 0.32 metres wide at the top, thinning very slightly toward the base, with a narrow chamfer, a bevelled edge cut at an angle, running along one side. The carved decoration is worn and chipped, but enough survives to read its basic scheme. An incised cross-stem rises from a stepped base, topped by a circular knop, a rounded boss or knob, and above that the lower arc of an outline circle that once formed part of a cross head. It is a restrained design, and the slab carried no inscription, or at least none that anyone has been able to identify. This kind of incised graveslab was a common form of medieval funerary marker in Ireland, and the Cashel example fits broadly within that tradition, though its later reuse as architectural fabric gives it a practical, unsentimental afterlife that the original carver almost certainly did not anticipate.