The fragment measures 0.72 metres tall and tapers from 0.3 metres wide at its base to just 0.14 metres at the top, a shape consistent with a mullion, the slender vertical bar that divides the lights of a window. One face of it carries a two-pronged, fork-like design carved in low relief, the kind of decorative detail that would have been unremarkable on a late-medieval building but now survives as a lone and slightly puzzling object in a field.

Where the fragment originally stood is not known, but the most plausible candidate is a ruined tower house roughly 230 metres to the west-northwest. Tower houses, compact fortified residences built across Ireland from the 14th to the 17th century, were often fitted with stone-mullioned windows, and carved decorative elements like this one were not uncommon in their construction. If this fragment did come from that building, it has travelled only a short distance from its original context, though the circumstances of how it came to rest beside a much later cross remain unrecorded. The pairing of the two objects, separated by several centuries in date and entirely different in purpose, gives the spot a quiet oddness that a casual glance might easily miss.