In general, the area of the new development in 60 square feet or so of the one-bedroom and one-bathroom belongs to the small type, 80-95 square feet of the two-bedroom and two-bathroom type belongs to the middle type (also known as the middle set), more than 120 square feet of three-bedroom and two-bathroom is the large type, because it basically belongs to the enjoyment of the type of the big set of the also known as the big set of the. But there are a lot of developers to build a house area of 120 square feet only two rooms, or due to the reason of the high level, increased the elevator resulting in a large area of two rooms which can not be said.