The tallest T-shaped pillars at Göbekli Tepe stand roughly 16 to 18 feet high and weigh several tons (estimates range from about seven to ten), and the largest stone enclosure measures about 65 feet across.
Notes on verification
Matches original Smithsonian article quoting archaeologist Klaus Schmidt; independently corroborated by todayifoundout.com and Archaeology Magazine/factsanddetails.com with consistent figures on pillar height, weight, and ring diameter.
Sources
- Gobekli Tepe: The World's First Temple? - Smithsonian Magazine (smithsonianmag.com)
- https://factsanddetails.com/world/cat56/sub362/entry-6007.html (factsanddetails.com)
- https://www.todayifoundout.com/index.php/2013/06/the-mystery-of-gobekli-tepe/ (todayifoundout.com)
- https://www.archaeology.org/issues/may-june-2021/features/turkey-gobekli-tepe-hunter-gatherers/ (archaeology.org)