The engine of this little wonder is 7" tall and almost a foot long. The rest of the cars are proportional as you can see, averaging 12" long themselves for a 6-1/2' long finished wooden toy. Your plans come with very detailed and easy to read set of instructions written by a master toy maker. Like most train plans we've seen, each car has a list of materials and measured drawings with exploded diagrams for assembly. There are full size patterns only for the curved parts. Any of our train projects are "do-able" by the beginner with just a little patience and make great heirloom-quality gifts.