Generational cohorts do not suggest generations, which are typically 20 to 25 years. Cohorts vary in the number of years covered. For marketing purposes, the relevance is in the years when the cohorts came of age.
The name Big Ben was given to a 13.7 tonnes, 2.2 meters tall, 2.9 meters wide hour bell, which is actually the main bell housed within the Clock Tower of the Palace of Westminâ¦ster. The tower, named Elizabeth Tower, is 96.3 metres (315.9 ft) high, 15 meters wide.
1 The building was designed by architect Charles Barry and built in the 1840s, replacing an earlier building destroyed by fire. The complex of buildings covers 8 acres and has over 1,100 rooms.  Big Ben is the name of the huge bell in the Elizabeth Clock Tower.