O scale was the dominant size, with a ratio of 1:48. However, in the early 20th century, a growing demand for more compact ...

Model trains are measured using: Scale, which tells you the ratio of your model train compared with a real one. An O scale model train is 1:48, so 1 inch on the model equals 48 inches on a real train.

O scale trains are 1:48 size models. While there are larger model railroad museums, Gribbell says he believes this is the biggest O scale model one. "There's some bigger ones in HO scale.

N scale model trains are 1/160 th. of the size of the real thing, but true in all the details. The 10 trains and their 80 feet returns to the library on July 25 for an all-day free program on ...