Eddy, a tile is 16 meters on each side according to the Maxis guide. I want to say a small city is 64x64 tiles, medium 128x128, and large 256x256, but that's from memory and I don't have the guide with me at the moment. whoman, use the Home and End key to rotate ploppable buildings before you click to place. For RCI Zones, Alt gives you an alternate facing if avaliable and Shift turns off the auto streets.