It measures roughly nine metres across in either direction, and that central depression is the detail that gives it away. What is recorded here are the probable remains of a hut site, the faint earthwork trace left by a dwelling whose occupants, date of construction, and precise purpose have not been established.

Hut sites of this type are among the more modest survivals in the Irish archaeological record. The basic form, a low raised ring of compacted earth and debris with a sunken interior, reflects a simple construction method in which the gradual accumulation of occupation material around the edges of a dwelling creates a slight bank over time, while the floor area remains at or below the original ground level. Without excavation it is rarely possible to say more than the broad category allows. The site at Sarue fits that pattern: the mound and its depression are consistent with such remains, but little else can be confirmed from surface evidence alone.