What makes it quietly odd is its geometry: one straight side, measuring 8.8 metres along the north, is not a wall at all but an ancient field boundary that was simply incorporated into the structure, with the curved remaining sides built up in crude drystone to complete the shape. The whole interior spans only about 5.4 metres north to south, which gives a sense of just how compact and purposeful this place once was.

The construction is rough but considered. The drystone walling, where it still stands, reaches around 0.6 metres in height and runs about half a metre thick, the kind of modest but deliberate stonework associated with early agricultural or pastoral enclosures. A more unusual detail appears at the south-east section of the wall, where a run of contiguous upright slabs, each standing about 0.8 metres high, was used instead of the coursed drystone technique employed elsewhere. This mixing of methods in a single small structure suggests either different phases of construction or simply the practical use of whatever materials were immediately to hand. Because the site sits on a slope, the southern portion of the interior has been built up and levelled, a small but telling piece of effort that implies the enclosure was meant to be used as a defined, functional space rather than simply marked out. Roughly 30 metres to the west, a hut site survives, suggesting this was once part of a small cluster of activity on the hillside rather than an isolated feature.