With our full size plan, you can make this mighty train. This is a big one: The engine is 31" long, the box car and caboose are 20" long. Big enough so a child can sit on the box car. Very sturdy design for many hours of hard play. The wheels needed are 5-1/8" diameter x 1-1/8" thick and fastened with lag screws for durability. The available trim pack contains hubcaps, screwhole buttons and smokestacks. Wheels are not in this trim pack. Cut your own wheels and save a ton of money on this project. If you cannot make the wheels you would need to order 14 # WT514. Remember plans are not included with trim packs.