It measures roughly five metres across, defined by a surrounding fosse, the term for a ditch or trench cut into the earth, that runs between two and a half and just over three metres wide. The interior is level and grass-covered, giving little outward sign of what it once was: a ditch-barrow, a type of prehistoric funerary monument in which the defining feature is not a raised mound but the encircling ditch itself.

Ditch-barrows are among the less conspicuous survivors of Ireland's prehistoric burial landscape, often reduced over millennia of agriculture to faint surface traces. This one at Ballynahinch retains a measurable profile, the fosse still reaching between fifteen and twenty-five centimetres deep at its base, which narrows to between fifty and seventy centimetres wide. What makes the spot quietly interesting is its company. A second ditch-barrow lies approximately ninety metres to the north-east, and roughly a hundred metres to the north there is a further depression which local knowledge suggests may be a third, though poorly preserved; clay is said to have been dumped into it at some point, obscuring whatever remains beneath. A separate enclosure sits just twelve metres to the north-east of this barrow. The clustering of these features across a relatively small area suggests this corner of Tipperary held some significance in the prehistoric period, even if the precise nature of that significance has long since dissolved into the land.