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.

For those who know their model trains, large scale includes S-scale, O-scale (Lionel size), G-scale (often found in garden railroads), F-scale, 7 ¼ gauge, and 7 ½ gauge models.

Before HO scale became the standard for model railroading, 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 ...

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.

That’s not all you’ll find at the home of model-train club Scale Rails of Southwest Florida, where its 46 members have duplicated those towns as a model-train layout. “I call it 3-D art ...