HO Scale is a popular model railway scale that represents a ratio of 1:87. This means that one unit of measurement on the model corresponds to 87 units in real life. It is widely used by hobbyists for building detailed train layouts and landscapes, making it a favorite among both beginners and experienced modelers. The name "HO" stands for "Half O," indicating that it is half the size of the O Scale, which has a ratio of 1:48. HO Scale trains and accessories are readily available, allowing enthusiasts to create intricate scenes and operate realistic train systems in a compact space.