Model Train Scale and Guage
Some people think that scale and gauge are interchangeable terms, but that is not the case.
Model Train Scale

The scale is the proportion of the replica to the real thing.
eg, HO scale locomotives are 1/87 the size of the real-life locomotive, or an HO scale locomotive is 87 times smaller than the real locomotive.
Common scales include HO(1:87), N(1:160), O(1:48), and Z(1:220).
There are more scales than these, (as shown below) but they are less common and harder to find.
- Z Scale is a 1:220 ratio.
It is tiny and highly detailed and is an excellent choice if you have limited space.
- N Scale is a 1:160 ratio.
It is the second smallest scale available.
- HO Scale is a 1:87 ratio.
The most popular scale of the model train. There is an endless supply of trains, cars, train tracks, buildings, and scenery. The detail on HO is good and a fabulous setup can be put together in a reasonable amount of space.
- S Scale is a 1:64 ratio.
It is larger than the HO and is popular among those with plenty of room.
- O Scale is a 1:48 ratio.
It is a popular choice for young children because they are able to easily handle them.
- G Scale is a 1:22.5 ratio.
It is the perfect choice for the garden set up.
Other scales include
- T Scale is a 1:450 ratio
- TT Scale is a 1:120 ratio
- OO Scale is a 1:76.2 ratio
- 1 Scale is a 1.32 ratio
Model Train Gauge
Gauge is the width between the inside running edge of the track.
