Hopefully this is a simple one folks. OK Standard Gauge is 4' 8 1/2" and Broad gauge is anything larger than that. Below standard we have narrow, miniature and model railways. At which measurement does each begin & end please? I've been told a model is too small to ride on and if you can ride on something small, that is a miniature gauge. But where is the difference between miniature and narrow gauges please? Just for interest: The difference between a ship and a boat is what they carry. A boat carries passengers, a ship carries freight. Hmm... must try telling the Captain of the QW2 "This is a nice BOAT" and watch his reaction.