They were transported from a quarry 25 kilometers away from the temple and set up circularly, 33 meters in diameter. Each sarsen measured 4.1 meters high, 2.1 meters wide, 1.1 meters deep, and weighed about 25 tons. To join the structural elements together, builders used mortise and tenon joints. The construction, along with the transverse beams, reached a height of 4,9 meters. The circle’s inward-facing wall surface was more finely finished and smoothed. Five triliths - two vertical boulders topped with a lintel - made with dressed sarsen stone were erected in a horseshoe shape within the circle.
