The near complete skeleton of a stegosaurus - named Apex - is 11ft (3.4m) tall and 27ft long, Sotheby's says.The near complete skeleton of a stegosaurus - named Apex - is 11ft (3.4m) tall and 27ft long, Sotheby's says.The near complete skeleton of a stegosaurus - named Apex - is 11ft (3.4m) tall and 27ft long, Sotheby's says.