What makes the example at Lisfunshion quietly compelling is not grandeur but detail: two concentric earthen banks, each with its own fosse, or defensive ditch, wrapped around a roughly circular interior just over twenty-one metres across. Most ringforts that survive in the Irish landscape have been reduced to a single bank and ditch at best; the presence here of a second, outer circuit, however eroded, suggests a little more deliberate effort went into its original construction.

The site sits on a gentle north-facing slope in undulating pastureland, with a stream running east to west about twenty metres to the north. The inner bank measures nearly four metres across at its base and stands about a metre above the surrounding ground on its outer face. The flat-bottomed fosse between the two banks is four metres wide and drops to a depth of over a metre, dimensions that would have made casual entry considerably less straightforward than the present, heavily overgrown state implies. A second, shallower fosse, surviving only in the north-east quadrant, adds another layer of enclosure. Both banks have a noticeably steep profile, which is consistent with deliberate shaping rather than simple mounding. A six-metre break in the outer bank on the southern side may mark a former entrance, though there is no corresponding visible gap through the inner bank, so the original access route remains unclear. A narrow field drain has since been cut along the outer face of the eastern bank, and cattle have widened a gap in the north-west quadrant to about one and a half metres, the ordinary pressures of agricultural land doing what centuries could not quite manage on their own.