The feature is a ring-ditch, a type of monument generally understood to be the eroded remnant of a prehistoric burial mound, where the encircling ditch that once defined the base of a barrow has outlasted the mound itself. What survives here is modest in scale, roughly 5.5 metres east to west and 5.7 metres north to south, with a continuous ditch less than a metre wide that traces the entire circuit without any break or entrance gap. That unbroken circuit is notable; many comparable features preserve a causeway or gap where the ditch was interrupted, but this one offers no such clue about how, or whether, people moved in and out of the enclosed space.

The ring-ditch sits at approximately 91 metres above sea level on relatively flat ground, close to the western boundary of the field. It is not alone. A larger ring-ditch lies only about ten metres to the north-west, and the broader landscape around Ardoyne carries further traces of early activity: an enclosure sits roughly 375 metres to the north-north-east, while a ruinous church and its associated graveyard lie about 476 metres to the south-south-west, near the townland's border with County Carlow. The clustering of these features, prehistoric burial monuments alongside early medieval ecclesiastical remains, suggests that this corner of south Wicklow held some significance across a long span of human activity, even if the precise nature of that significance is now difficult to recover. The ring-ditch itself came to archaeological attention through aerial observation, remaining faintly visible on satellite imagery from July 2021 despite the levelling effects of centuries of cultivation.