The site is invisible at ground level, belonging to that category of archaeology known as cropmarks, where buried ditches and banks reveal themselves only from the air, or on satellite imagery, as subtle differences in the colour and height of growing crops. What makes Dubber quietly arresting is the concentration of features in a single field: an oval enclosure, and nearby, three ring-ditches.

The enclosure itself measures roughly 32 metres north to south and 28 metres east to west, defined by a continuous fosse, which is simply a ditch cut into the ground, typically used to demarcate and defend an enclosed area. Its oval shape and fosse are consistent with early medieval enclosed settlements found widely across Ireland, though the record does not specify a date or original function for this particular example. Sitting about 295 metres to the north-east of a second, larger cropmark enclosure, the site is part of what appears to be a broader pattern of ancient activity across this stretch of ground. The three ring-ditches just to the north of the enclosure, closer to the field boundary, are a separate matter; ring-ditches are often associated with prehistoric burial monuments, the eroded remnants of round barrows or similar funerary features, though again, the available record does not confirm this for Dubber specifically. The site was compiled by David O'Connor and revised by Tom Condit, and the cropmarks were confirmed as visible on Google Earth imagery dated 24 June 2018.

Because everything here is subsurface, there is nothing to see during a casual visit on foot. The cropmarks show best from above, and the Google Earth imagery from midsummer 2018 remains a practical starting point for anyone wanting to understand the layout. Cropmarks tend to be most legible during dry summers when crops over shallow buried features ripen faster or become stressed, making the underlying archaeology readable in ways that wet seasons obscure. The field is agricultural land, so access is a matter for the landowner, but the imagery is freely available online and gives a reasonable sense of how the enclosure and the ring-ditches relate to one another and to the wider landscape around Dubber.