What makes it quietly interesting is the way its original form has been partially absorbed into the later agricultural landscape: on the south-western to south-eastern side, the outer bank has been replaced or overlain by a field boundary, the kind of pragmatic reuse that happened across Ireland for centuries, and which can make these features surprisingly easy to miss or misread.

Ringforts, known variously as raths or lios depending on regional tradition, were the most common settlement type in early medieval Ireland, typically enclosing a family farmstead within one or more circular earthen banks. The example at Flean Beg follows that familiar pattern. It is roughly circular, measuring 32 metres on its north-west to south-east axis, and is enclosed by an earthen bank that stands about 0.4 metres high on the interior face and rises to 1.7 metres on the exterior. Beyond that bank lies a fosse, the defensive ditch that in many cases supplied the material to build the bank itself, here some 2.3 metres wide. A second outer bank runs from the south-east around to the south-west, adding another layer of enclosure. On the south-west to north arc, the inner bank grades into a scarped edge, essentially a cut or shaped slope, that reaches 2 metres in height and spans roughly 5 metres in width. The site was recorded and compiled by Denis Power.

Accessing the site means crossing ground that lives up to its description. The eastern half of the interior is marshy rough pasture, while the western half is dense with overgrowth, so the full circuit of the banks is unlikely to be visible in a single pass. The fosse and the change in bank character as you move around the perimeter are the features most worth tracing, since they give a sense of the different phases or intentions in the structure's design. A dry spell in late summer or early autumn tends to make these low earthworks more legible than the waterlogged months would allow.