This thread is just to clarify what qualifies as a mini or micro layout. The first issue is the size, keep in mind scale has nothing to do with gauge. In other words if it's HO it doesn't matter if it's standard or narrow gauge as buildings, trees, people ect. are still the same size.All sizes are in feet.

Z-Scale......Mini-3.....Micro-1

N-Scale......Mini-5.....Micro-2

HO-Scale.....Mini-10....Micro-3

O-Scale......Mini-20....Micro-4

G-Scale......Mini-32....Micro-5

What differentiates a mini or micro from a diorama is that you must be able to switch a car or make laps with your train on the portion of the layout the fits within the size limits.

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If it meets those requirements but you want to add on to it by connecting it to another layout or staging yard for extra operating options that's fine. If you can't switch or make laps unless it's connected to something else then it's not a layout but a diorama.

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These standards can (and probably will ) be amended if needed. Thanks