It sits quietly in pasture at the base of a north-east-facing slope, its interior level and grassy, giving little away. What it represents, however, is a burial monument of considerable antiquity: a ring barrow, a form of prehistoric funerary enclosure typically dating to the Bronze Age or earlier. The defining feature of a ring barrow is a central area enclosed by a shallow ditch, known as a fosse, with an earthen bank raised just beyond it. The idea, broadly, was to mark and separate a burial space from the surrounding landscape, though what precisely was interred, and how, varies considerably from site to site.

The monument at Reens West is modest in scale but coherent in form. The enclosed area measures roughly 10.4 metres north to south and 10.8 metres east to west, making it nearly circular. The fosse is 2.6 metres wide at its base and around 0.3 metres deep, with an external earthen bank that rises about 0.45 metres on its interior face and 0.15 metres on the outer side. The site was compiled and recorded by Denis Power, with notes uploaded in August 2011. Like many such monuments across Munster, it has not escaped the encroachments of later land use: a field boundary cuts across the fosse and bank from the west-north-west toward the north, and a stream clips the outer edge of the bank to the north and north-east. These intrusions have truncated what would once have been a complete circuit.

The site is in private agricultural land and lies beneath working pasture, so any visit would require permission from the landowner. There are no markers or interpretive signs to guide a visitor, and the fosse and bank are shallow enough that, depending on the time of year and the length of the grass, the outline can be difficult to read from ground level. A dry period in late summer or early autumn, when the grass is shorter and soil moisture variations become visible, tends to offer the clearest sense of the monument's shape. Looking for the slight depression of the fosse and the gentle swell of the bank, particularly on the undisturbed southern arc where neither the field boundary nor the stream has done their work, gives the best impression of what the original enclosure looked like.