In general Passenger aircrafts have bigger sizes than their military aircraft family, so their models are produced on a smaller scale for the convenience of storing the collection. The main for civil aircraft plastic models is the scale 1: 144,also is widely used the scale 1: 200. Civilian aircraft of a smaller size are often produced on a scale of 72, but sometimes on this scale you can find real "elephants" with a wingspan of more than one meter, but the price of such models will be high, and assembly and painting will be difficult for beginning modelers.
There are also smaller scales for plastic passenger aircraft models - 1: 288, 1: 350, 1: 400 ... Such models can be placed without problems, for example, on the worktable.