16mm and G gauge

Welcome to the forum.

G is usually 1:22.5 in scale and 45mm track, representing metre gauge. There are other scales from 1:22 - 1:32 running on the same track.

16mm is on both 32mm and 45 mm, representing 2 and 3 ft gauge and is 1:19 Scale.

In essence, they are close enough for anyone with metre gauge and 3 ft to run both together....
 
GAUGE VERSUS SCALE

Gauge
is the distance between the rails of the track in the scale chosen. Scale is the proportion of the model to the full-size item. Therefore, 4mm:1ft scale should be more correct in describing a layout, whereas OO gauge should really only refer to the track gauge.
16mm vs G Scale.png
 
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