Size: The actual size is basically true to the dimensions they list. Since the walls take up some space, the actual jumping area is about 7'x7' which is fairly generous, allowing a couple kids to bounce without hitting each other. More than two or three kids, and they're going to have to be careful not to knock heads. The slide doesn't protude into the jumping area, so that's not taking up too much space. The size of the slide is much bigger/better than I expected; big enough and high enough for kids to actually enjoy. The bounce floor is higher off the ground than I imagined, so (and this is probably a good thing) kids under two will need some help getting in.