O Gauge

O gauge is a scale used in model railroading, primarily measuring the distance between the wheels on the train. It typically runs at a scale ratio of 1:48 (in the United States) or 1:43 (in the UK), simulating real trains on smaller tracks. The gauge—meaning the track width—is 1.25 inches (32 mm). O gauge is popular for its balance between detailed realism and manageable size, allowing for realistic scenery and structures. It has a rich history and offers a wide variety of locomotives and rolling stock, making it accessible for both hobbyists and collectors.