The enclosure measures roughly 12 metres north to south and just over 20 metres east to west internally, making it a modest but clearly deliberate feature in the landscape. What makes it quietly odd is the interior: it sits at a slightly higher level than the surrounding ground, suggesting that centuries of undisturbed soil accumulation, or perhaps the original construction itself, have preserved a kind of raised platform within the ring.

Enclosures of this type, a low bank of earth thrown up to define and protect a roughly circular or oval space, are found across Ireland and tend to be associated with early medieval settlement, stock management, or ritual use, though without excavation it is difficult to say which purpose drove the construction at Dinneens. The bank here is around 6 metres wide where it survives and rises to about 1.5 metres above the interior floor and 1.6 metres above the external ground level. That asymmetry, higher on the outside than the inside, is consistent with an enclosure built primarily to keep something out rather than to create a raised platform deliberately. A stretch of roughly 5 metres along the northern arc has been levelled entirely, most likely through agricultural activity over time, which gives the site a slightly lopsided appearance and makes the surviving portions all the more legible by contrast. The site was documented as part of the North Kerry Archaeological Survey published in 1995, which catalogued a wealth of prehistoric and early historic features across the region.