What makes the site at Ballyvouskill quietly unusual is not drama of scale but precision of design: the stones are arranged as a five-stone circle, a type found almost exclusively in the Cork and Kerry region, and they appear to have been laid out with a deliberate astronomical orientation in mind.

Five-stone circles are among the more distinctive monuments of the Irish prehistoric landscape. They typically consist of a recumbent axial stone placed between two portal stones, with two further stones completing the ring. The axial stone, by convention the lowest in the circle, is thought to have been deliberately aligned to mark the movements of the sun or moon along the horizon. At Ballyvouskill, a probable axial stone survives alongside four prostrate slabs, and the estimated main axis runs roughly west-north-west to east-south-east. The circle itself, measured from outer rim to outer rim, is approximately twelve metres in diameter and is enclosed by a fosse, which is a shallow surrounding ditch, around 0.3 metres deep and between two and two and a half metres wide. Faint traces of an external bank are still visible along the eastern side, suggesting the monument once had a more complete enclosing earthwork. The cut-away bog setting, where peat has been removed over centuries of turf-cutting, has left the stones exposed but also altered the ground around them considerably since they were first erected.