Alexander the Great was approximately 5 feet tall, which was the average height for Greek males of that time period. Due to his average height, Alexander and his comrades referred to certain taller people they met in their travels as giants.
When Alexander met the Indian king Porus, he was struck by the man's height of 7 feet, and Alexander's biographer thought the tall man would look as fitting on an elephant as a Greek man looked on a horse. Later, Alexander met Celts who, averaging between 6 feet and 6 feet 6 inches, were not as tall as Porus. Nonetheless, the 5-foot-tall Greeks thought these men tall enough to scratch the sky with their backs.