TY-Scale is used to create the “World’s smallest model railroads”. With a scale, of 1:900, TY-Scale is four times smaller than Z-Scale. This operating layout is approximately 7 inches wide and 4 inches deep. This same layout, if created in G-Scale would be about 23 feet wide and 13 feet deep. Please see http://www.StansTrains.com for more information and photos.