What survives is modest but legible: a roughly circular enclosure measuring about 27.5 metres across, defined by an overgrown earthen bank and a shallow external fosse, the term for a defensive ditch dug around a fortified area. The bank itself has worn down considerably over time, standing barely 20 centimetres above the interior ground level in most places, though at its most intact point on the west-northwest side it still rises to nearly 1.9 metres as a scarp, a near-vertical face where the earthwork has eroded unevenly rather than slumping away gradually.

This kind of earthen ringfort, known in Irish as a ráth, was the most common form of rural settlement in early medieval Ireland, typically enclosing a farmstead and its associated buildings within a banked and ditched boundary. Thousands once existed across the country; many have been ploughed out, built over, or reduced to faint cropmarks. The Funshinagh example belongs to the category that has survived only partially, its bank largely collapsed into a scarp rather than retaining its original profile, and its fosse now shallow at roughly 45 centimetres deep and just under three metres wide. No original entrance has been identified, which is not unusual where a site has weathered to this degree, since entrance gaps are often the first features to disappear as earthworks settle and vegetation takes hold.