They go in increments of 50m. If you asked the width people go to, it would be 25m.
So your comment about avoiding the metric system is not really accurate. We don't say the Earth is approximately equal to 150 million kilometres from the Sun, we say one AU. We just use numbers that can be comprehended.
OK then about eight light minutes. Not sure there is any 31 mile long olympic swimming pool, though, but there are plenty of units out there so I can admit the possibility.
Funny how we went through the monumental effort to build and adopt a whole new system of units just because a few people were bad at grade-school arithmetic and mental math.
Oddly enough, it's still possible to have 12 metres or 12 tonnes within the metric system. I realise this is baffling and confusing to Americans but it's really true!
I think most people can understand what a meter is, or what a kilometer is, but would have no idea of what a kilojoule is, or what the energy inside a barrel of oil is.
So your comment about avoiding the metric system is not really accurate. We don't say the Earth is approximately equal to 150 million kilometres from the Sun, we say one AU. We just use numbers that can be comprehended.