[walthamstow]

Good point about IFAB, I have only been referring to orgs like UEFA and the FA.

In England all organised football, even amateur, is regulated by the FA, so we can say there is no regulation pitch here in England that is less than 60m wide

But you're right, elsewhere it could be all sorts. Pitches can be hemmed in by rocks, trees, water, dwellings, whatever so people will just play on what they have.

[smcl]

I believe the FA actually use the looser dimensions (meaning 45 metre width is ok), but you're right few clubs at the upper end of the pyramid will really push the boundaries so to speak. Might make for some fun cup encounters though :)