The group spreads across two adjacent townlands, Timoney Hills and Cullaun, and at its greatest recorded extent numbered 245 stones, accompanied by five cairns. By the time a systematic survey was carried out in the 1930s, many had already gone. The cairns have since been removed entirely.

When the Inspector of National Monuments recorded the site between 1934 and 1936, he counted 221 stones still standing or lying in place, 173 in Timoney Hills and 48 in Cullaun. Writing in 1936, he described them as "a most remarkable group," noting that they appeared to follow no particular arrangement, with one exception: a stone circle in Cullaun that stood apart from the general scatter. The stones are all of red sandstone or conglomerate and range from roughly 0.9 to 1.8 metres in height, with the taller examples averaging around 1.5 metres. A later map published in the Archaeological Survey of Ikerrin, compiled by Stout in 1984, recorded 245 stones in total, of which 70 had by then been removed. That tally alone suggests a long and ongoing process of loss. The individual stone catalogued here was designated stone 7U on the Inspector's map and forms part of a cluster of twenty-five within a single field. It could not be located during a subsequent visit, the field having become dense with furze and scrub.

There is a further complication. The stones sit within the landscaped estate of Timoney Park, associated with the Parker-Hutchinson family, and their position within a designed landscape has led some researchers to question whether all the stones are genuinely prehistoric. The possibility that some may have been arranged or repositioned as ornamental features during the estate's development introduces an uncertainty that has never been fully resolved, leaving the Timoney Hills group in an ambiguous space between ancient monument and Victorian curiosity.