Just Aurochs to say people were generally shorter throughout history, some people at some times were. Beaker burials of someone over 1.8 metres are not uncommon and so on.
Extract from a Wiki article- "According to a study by Economist John Komlos and Francesco Cinnirella, in the first half of 18th century, the average height of English male was 165 cm (5 ft 5 in), the average height of Irish male was 168 cm (5 ft 6 in). The estimated mean height of English, German, and Scottish soldiers are 163.6 cm – 165.9 cm (5 ft 4.4 in – 5 ft 5.3 in) for the period as a whole, while that of Irish was 167.9 cm (5 ft 6.1 in). The average height of male slaves and convicts in North America was 171 cm (5 ft 7 in)."