What makes it quietly odd is its layered geometry: a modest ring defined by a stone and earth bank, set within a much larger oval depression, one structure apparently cradling another, each defined by a different kind of boundary.

The inner enclosure is roughly twenty metres across internally, with a bank some 3.3 metres wide. The bank itself is not particularly imposing, rising only around 0.4 metres on the interior side and 0.8 metres externally, the difference suggesting the ground was deliberately scooped or built up to give even a slight sense of enclosure. A small mound of earth and stone sits in the western sector of the interior, its function unclear. The monument appears on the first edition Ordnance Survey six-inch map of 1842, and was hachured, marked with lines indicating a raised or banked feature, on the 1916 Cassini edition. By the 1890s OS twenty-five-inch mapping, a second, much larger boundary had been recorded: an oval scarp encircling the whole site, estimated at roughly sixty metres northeast to southwest and fifty metres northwest to southeast. On a field inspection in 1999, this outer scarp was still partially traceable from the north around to the southeast, though scrub and overgrowth had obscured much of it. The enclosure sits on an east-facing slope between the 300 and 400 foot contour lines, with open views from north-northeast to southeast, a position that seems deliberate, whatever the original intention.