Wedge tombs are the most numerous megalithic tomb type in Ireland, built during the late Neolithic and into the early Bronze Age, and they take their name from their characteristic shape: wider and higher at the western or south-western end, narrowing toward the east. This one in Crohane is a compact example, modest in scale but retaining enough of its original architecture to reward close attention.

The structure consists of a roofless antechamber at the western end, measuring roughly 1.1 metres long and 1.3 metres wide, formed from single sidestones. A pair of jambs, set about 0.9 metres apart, separates the antechamber from the inner chamber beyond, which is roofed by a single capstone resting on two sidestones at each side. The eastern end is sealed by a single closing stone, now buried beneath accumulated peat. Two slabs to the south of the antechamber are the remnants of outer walling, a feature that would originally have helped define the tomb's outer envelope. At the western facade, two large leaning slabs frame a tall, slender upright stone, just under 1.3 metres high and only 0.15 metres thick, giving the western end a striking vertical accent amid all the horizontal weight of the surrounding slabs. A displaced stone, possibly once part of the roof, leans upright behind the facade. The whole structure sits within a low surrounding mound, now only about half a metre high, the last visible trace of what would once have been a more substantial earthen covering. The tomb was catalogued by Ruaidhrí de Valera and Seán Ó Nualláin in their 1982 survey of megalithic tombs across Cork, Kerry, Limerick, and Tipperary, the fourth volume in their systematic national study.