The structure is D-shaped rather than the more familiar full circle, measuring roughly 29 metres north to south and just under 27 metres east to west. In places the wall, built without mortar in the dry stone tradition of the Burren, has been reduced to a single course of transversely laid slabs, its maximum surviving height no more than a metre and its thickness ranging from half a metre to just under one. What it once enclosed, and when, remains an open question.

The enclosure came to formal attention largely because of Tim Robinson's map of the Burren, published in 1977. Robinson, the writer and cartographer who devoted decades to charting the landscapes of Connaught and the west of Ireland with unusual precision, marked it on his survey, and that record was enough to bring it into the official Sites and Monuments Record in 1992 and later the Record of Monuments and Places in 1996. The category assigned, simply "enclosure", reflects how little is known beyond the physical outline. Enclosures of this kind can serve many purposes across a long stretch of Irish prehistory and early history, from livestock management to settlement to ritual use, and without excavation the function of this one stays unresolved.