The cross is modest by any measure, just 0.4 metres tall, with a span of arms of 0.11 metres and a thickness of only 0.04 metres. It has been crudely shaped, with no carvings, inscriptions, or decorative features of any kind. It is the mortar that gives it significance. When a stone has been set in mortar, it has been embedded in a wall, and the presence of that mortar here points to a long history within the church structure at Killadreenan. The cross likely predates whatever phase of building or rebuilding encased it, placing its origins at a considerable remove from the present day, even if no precise date can be attached to it.

The church itself sits within an area with early ecclesiastical associations, and finding a plain, functional cross of this kind worked into its masonry is consistent with a broader Irish tradition of incorporating older devotional stonework into later construction. The cross now leans inside the north wall of the nave, unannounced and easy to overlook, which is perhaps part of what makes it worth a second look.