G scale covers numerous sizes, and G scale models are most often used for outdoor sets and garden railways. G scale trains are large and durable, and their size often means a high level of detail can be achieved by scale modellers, as well as on many ready to run kits. This size is also where steam powered models become more widely available. 1 gauge models, of 1:32 scale, are of a similar size to G scale trains, and G scale trains can often use 1 gauge tracks. A wide selection of accessories, ready to run models and model kits are available for G scale trains.