Features since 1962: 1) dimensions:200 sq. Ft. House to unlimited size. Example; hospital and shopping center ect.. 2) made of foam (polystyrene) aluminum or steel panel or similar material 3) comes in different designs and sizes, all costume made from plans. 4) compact packing for shipment, the container contains 2000 sq. Ft. Of buildings. 5) diy concept, requires no heavy work on site. Unskilled help is all you need. 6) assembly instructions provided plus, we meet the truck on the project to train your contractor. I look forward to hearing from you.