The Z Scale train is a smaller version of the model train. It's not as popular as HO Scale, but it does have its niche in the world. The scale for this type of model train is 1:220 (one inch on the model represents 220 inches in real life). While there are many different types of Z Scale trains out there to choose from, one thing they all have in common is that they are made to be run on tabletop surfaces like tables or desks. That means you can put your desk side by side with other people and still enjoy playing together!