It sits just twenty metres from the rocky shoreline, steep-sided and grass-covered, with a rough outer skin of large stones and slabs. At its summit, a modest cairn, roughly three metres across and less than a metre high, marks what was once a more substantial presence. Local tradition calls it Bailey Beag, the small bailey, to distinguish it from its larger neighbour, Bailey Mór, which stands about 150 metres to the north.

At its core, the mound appears to be a natural sand hill that was shaped, reinforced, and built upon over time. Ordnance Survey maps from 1838 and 1920 show it as considerably wider than it is today, suggesting that erosion, perhaps accelerated by Atlantic weather and the loss of protective vegetation, has steadily reduced it. Some of the stones near the summit are set upright in a way that hints at deliberate construction, and a researcher named Henry, writing in 1945, recorded the remains of a house here when he visited in the late 1930s. A scatter of seashells visible on the upper slopes and summit, exposed where the grass cover has worn away, points to the mound having been a place of habitation at some point, with shells likely discarded as ordinary domestic refuse. Within a short distance of Bailey Beag, an ecclesiastical site lies to the north-east and a graveyard to the south-east, placing this modest mound within a cluster of features that suggests the island once supported a more organised and populated community than its current emptiness implies. The mound is a protected National Monument in state ownership.