Scales are used in the model train niche to determine the ratio or proportion at which the miniature versions of the original trains are made. Like the HO scale, the N scale is a well-liked model train scale. The scale can range from a ratio of 1:148 to a ratio of1:160. This depends on the producer of the model train or the standards of the country in which the product is being manufactured.

The gauge is a term used for the distance between the rail tracks. The gauge for an N scale model train is commonly about 9 millimeters or 0.354 inches. Sometimes, the term gauge can be used in place of scale, though that is often not a correct method to employ. For example in the United Kingdom, N gauge actually means the ratio of the N scale used in track modeling.

N scale model train rails can be different in height, which is also a dimension of schedule. For example, schedule 80 can be 80 millimeters in height with black ties whereas schedule 55 can be 60 millimeters in height with brown ties. Usually a real train rail can have a height of up to 6 inches.

Advantages of the N scale:

N scale model trains are popular for many reasons. Since the N scale is smaller than HO scale, it occupies less room space and so allows enthusiastic model train collectors to build their layouts in their personal rooms in their homes. The models are almost half as small as that of the HO scale model trains. In this way, most N scale model trains are suitable for miniature war gaming. However, they are larger than the Z scale or the T scale, so a decent amount of intricate designing is made possible. Fewer amounts of raw materials such as brass, tin, and wood is also used in the manufacture of the N scale model trains.

Disadvantages of the N scale:

Since N scale model trains are pretty small due to the steep ratio to the real versions, it is difficult to create an exact replica of the original, and so production process is tedious and intricate. This drives up prices and only rich or very passionate hobbyist can collect these models. N scale is also not produced in as large quantities as the HO scale model trains, so parts that complement rail sets are not as widely available.

N scale model trains are commonly to be had in varieties such as ‘Ready-to-Run’ models, and Craftsmen Kits. The former can be used as soon as they are taken out of the box since parts such as couplers and trucks have already been attached at the factory as packed as it is. Minimal skill is required for this sort of N scale model train. The latter requires a lot of skill since the package may include lots and lots of small parts that need to be assembled in order to make the model train functional.