G-scale model trains are larger than O-scale model trains, making them ideal for those who want to use a battery for extended operating times. However, with advances in battery technology, O-scale trains are becoming more popular. G-scale and O-scale are two of the oldest standards that are preserved in train models. While G-scale trains may have a limited selection of trains and accessories, several manufacturers are dedicated to producing modern American-style Z-scale trains.
HO scale modelers typically have the widest variety of models available for rolling stock, locomotives and buildings. Modelers can choose any relationship to proportionally model a railroad, regardless of the scale they choose. With the continued popularity of train models in the United States, hundreds of manufacturers have provided thousands of different trains and accessories in a variety of stopovers and price ranges. To achieve the right look of a scene, modelers can use models or equipment from foreign manufacturers that produce products in different proportions.
While modelers strive to model every building, locomotive, and figure at the scale they want, it's often not possible. The first models weren't built at any scale or standard, but rather looked more like toys without any way of having different trains working together.
