Standard Gauge trains had their origin in 1906, introduced by Lionel featuring three-rail track. Ives, Boucher, Dorfan, and American Flyer made their own "wide gauge" products to compete with Lionel, until the Great Depression brought things to a close.
Standard Gauge reemerged in the 1940s and today offerings can be found from Lionel and MTH, as well as smaller companies.
If you'd like to compare Standard Gauge trains to other sizes, you can check out all of our model trains here.
