The structure itself is fourteen metres across, defined by a stone wall that has mostly collapsed but still shows, in places, the logic of its original construction: an inner and outer row of upright slabs set side by side, with an infill of earth and stone packed between them. This kind of double-faced wall with a rubble core is a relatively common technique in early Irish field architecture, designed to produce a thick, stable boundary from the materials immediately to hand. Along the south-eastern and southern arc, enough survives to read that original form clearly.

The enclosure sits on an east-facing slope above the valley of the Barony River, and its builders clearly accounted for the gradient. Rather than simply placing a circular wall on uneven ground and leaving an awkward tilt inside, they levelled the interior by cutting into the slope on the western side to a depth of around a metre, while the eastern side sits raised by roughly forty centimetres above the surrounding ground. The entrance, just over a metre wide, faces east and is flanked by two upright parallel slabs, a simple but deliberate arrangement. The interior is now covered with rushes, the result of poor drainage on bogland, but beneath that waterlogged surface the level floor remains. A field wall, still poking up through the bog on the north-western side, abuts the enclosure and belongs to a wider pattern of relict boundaries visible across the hillslope, faint traces of a farming landscape that predates the bog's advance. Rubble scattered down the slope to the east suggests the wall has been losing material for a long time.