Two uprights stand about 1.8 metres apart, one slightly taller than the other, while a third, much flatter stone lies embedded at the base of the most westerly upright. It is this third element, low and partially buried rather than freestanding, that gives the group its slightly awkward designation: anomalous. The word is a candid admission that the site does not fit neatly into the established categories of prehistoric monument, and that in itself is worth paying attention to.

The two uprights differ only a little in height. The taller stands to the south-east, reaching 1.15 metres, and measures roughly a metre across at its broadest face. The north-western stone is marginally shorter at a metre, and of similar width. The prostrate stone at the foot of the western upright is considerably smaller, just 0.2 metres high and roughly 0.9 metres by 0.53 metres, pressed into the ground as though it had always been part of the base rather than a feature in its own right. Whether the three stones were originally set together as a deliberate grouping, or whether the flat stone represents something later or incidental, is unclear. The arrangement was recorded by D. Lavelle in an archaeological survey of the Ballinrobe district, published in 1994 by the Lough Mask and Lough Carra Tourist Development Association, with additional detail attributed to P. Walsh. The surrounding area, bounded by those two large lakes in south Mayo, is known for prehistoric activity, but this particular group has so far attracted more questions than answers.