Tacitus, Germania (98 AD):

“They are a tall and robust people, of a ruddy complexion, with hair that is usually blond and eyes that are blue. Their bodies are strong and well-formed, and they are accustomed to hardships and physical labor.”

“The Germans, when grown up, are of the tallest stature, and their bodies are strong and well proportioned. They have broad chests and necks, and their waists are not so narrow as those of other men.”

Julius Caesar, Commentarii de Bello Gallico (58-50 BC):

“The Germans, who are very tall and robust, have a great reputation for strength and courage in battle.”