One of the most common railway gauges in Brazil is ~1600 mm. Although this seems like a metric designed gauge, it is in fact due to the chance that 5'3" equals

One of the most common railway gauges in Brazil is ~1600 mm. Although this seems like a metric designed gauge, it is in fact due to the chance that 5'3" equals 1600,2mm. This (particular type of broad) gauge is known as Irish gauge, and is also used in Ireland and Australia.