The wall, built in drystone style without mortar, runs to about thirty metres in diameter, stands between 0.8 and 1.5 metres high, and is roughly two metres thick, with larger stones laid at the base as a revetment to stabilise the structure. Nothing about it announces itself as different from the agricultural stonework nearby, which is precisely what makes it quietly difficult to read.

Circular enclosures of this kind are a recurring feature of the Irish landscape, and their purposes varied considerably. Some were ringforts, the enclosed farmsteads of early medieval families; others served as animal pounds or burial grounds; a few remain genuinely ambiguous. What complicates the picture at Farnees is the near-total absence of the usual diagnostic features. There is no external fosse, the ditch that typically surrounds a defensive enclosure, no identifiable entrance gap, and no trace of internal structures that might hint at habitation or ritual use. The western portion of the wall has also been removed at some point, which may account for some of the missing evidence, though it leaves the enclosure looking even more like an ordinary field boundary than it might once have done. Whether it was originally something more purposeful, or always a simple stock enclosure that happened to be built in a rounded form, the stonework itself does not say.