Hachured markings on OS maps indicate earthworks depicted by short radiating lines that suggest raised or sunken ground, a cartographic convention used when surveyors could still read the shape of a feature in the landscape even when it had been largely reduced. In this case, the enclosure has been levelled entirely, leaving nothing visible to the casual eye.

The site measures approximately 35 metres on its north-west to south-east axis and around 25 metres across, giving it a moderately compact rectangular plan. That rectangular form is itself worth noting. Many early Irish enclosures are roughly circular or oval, associated with ringforts and early medieval settlement. A rectangular enclosure of this kind can suggest a different function or date, possibly connected to later medieval activity, agricultural organisation, or an entirely separate tradition, though the available record does not specify any of this for Farranastig. Walsh noted the site in 1985, and it was subsequently included in the Archaeological Inventory of County Cork covering the east and south of the county. Beyond its dimensions and its presence on the maps, the enclosure keeps its history to itself.