N gauge is a popular model railway scale that represents a ratio of 1:148, meaning that one unit on the model is equivalent to 148 units in real life. This scale allows for detailed miniature trains and landscapes while taking up less space than larger scales, making it ideal for hobbyists with limited room. Trains and accessories in N gauge are typically 9 millimeters wide, which is narrower than other common scales like HO gauge or O gauge. This compact size enables enthusiasts to create intricate layouts with more tracks and scenery in a smaller area, enhancing the overall modeling experience.