We carry the most popular scales at Metro Hobbies. These are OO, HO and N scale. These scales a represented as follows:
OO is 1:76 scale (76 times smaller than the prototype)
HO is 1:87 scale (87 times smaller than the prototype)
N is either 1:148 scale or 1:160 scale (148 or 160 times smaller than the prototype)
Gauge is the width of space between the rails of the track. OO and HO use the same gauge and all N scale models use N gauge track. These gauges are as follows:
OO/HO gauge is width of 16.5mm
N gauge is a width of 9mm
HO scale and OO scale run on the same track, and all types of N scale run on the same track.