Roughly 55 metres across, it exists as a ring of trees planted deliberately to be viewed from a distance, specifically from the windows and grounds of St Austin's House, some 300 metres to the north. Standing inside or beside the field, a visitor would notice nothing out of the ordinary. The circle has simply sunk back into the land, invisible at ground level, legible only from above or, as was once the case, from the elevated perspective of a house whose occupants commissioned it.

This kind of feature belongs to the tradition of designed landscapes, in which landowners shaped their surroundings into pleasing compositions, planting tree-rings, avenues, and ornamental enclosures as living elements of an aesthetic scheme. The sole surviving record of this particular example is its appearance on the 1839 edition of the Ordnance Survey six-inch map, which marks it as a circular enclosure with trees on the perimeter. That it does not appear on later maps suggests the planting either failed or was cleared at some point after the mid-nineteenth century, leaving no trace that ground-level observation could recover. The low-lying setting would have made the circle all the more deliberate as a piece of design; in flat terrain, a ring of trees becomes a focal point, a punctuation mark in an otherwise open view.