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The Syrbotae, a species of giant mentioned in many medieval bestiaries, were said to live in Africa and stand about eight cubits tall (a cubit is the distance from a man's elbow to the tip of his middle finger).
Source: Pliny the Elder, Pliny's Natural History, Volumes 1–3, 160; Weber, Process of the seuyn Seuyn Sages, 327.