In the world of ridable model railroads, there are two common scales: 1" (meaning 1" to the foot or 1/12th full size) and 1.5" (1/8th full size). The smaller 1" scale trains run on 4 3/4" gauge track (rails are 4 3/4" apart), while the 1.5" trains are designed for 7 1/4" or 7 1/2" gauge track.Nate said:Is 1.6 inch scale the same as 7.5 inch gauge?