There are two general types of giants' tomb. In the so-called "slab type", uncut slabs are buried on end in the ground, and are arranged side-by-side. There is usually a central stele, which is the largest slab (up to 4 m in height) and has a doorway cut through it.
In the more primitive slab-type giants tombs, the central slab is unmodified aside from the entrance that is cut through it at the base, or else there is a crude dolmen-like arrangement of 3 uncut rocks to form the entrance (Osono, Sortali, Lolghi, Pescaredda). In more advanced slab-type giants tombs, the central slab is modified so as to be rounded on top, and has a simple design carved into the front surface (Dorgali, Goronna, Santu Bainzu, Coddu Vecchju).
Graphic reconstruction
The sepulchres have a characteristic rectangular plan with an apse. The burial chamber is usually 5 to 15 metres long and 1 to 2 metres high. The structures were originally covered by a mound resembling the shape of an overturned ship. Near the entrance an obelisk (betileinSardinian) is usually found, which symbolizes the gods or ancestors who watched over the dead.
The so-called "block type" tombs are made of rectangular-cut blocks (Bidistili, Madau II, Seleni II, Iloi, Mura Cuata).