5.5 mm scale

The term "5.5 mm scale" typically refers to a model railway scale in which the distance between the rails is 5.5 millimeters. This scale approximates a ratio to the real-world size that modelers use to create miniature scenes, trains, and landscapes. However, it's important to note that there isn't a widely recognized railroad scale that exactly aligns with 5.5 mm track gauge. The closest common scales include: - **HO Scale** (1:87.