Master Bathroom Designs

Where Can I Find Measurements For The Standard Sizes of Different Rooms of A House?
I am drawing out some plans for a two story house and I need to get an idea of the average size of different rooms such as the kitchen, bathroom, master bedroom, regular bedrooms, and dining room etc. so that I know how whether or not my placing on each story is realistic. I know there are a lot of variables involved, but I was hoping there was still a website or guide somewhere that has this type of information for people loooking to design and build their own house.
The 2006 IRC (International Residential Code), which is accepted as CODE in most of the United States, states the following as minimum room area requirements:
R304.1 Minimum area.
Every dwelling unit shall have at least one habitable room that shall have not less than 120 square feet (11 m2) of gross floor area.
R304.2 Other rooms.
Other habitable rooms shall have a floor area of not less than 70 square feet (6.5 m2).
Exception: Kitchens.
R304.3 Minimum dimensions.
Habitable rooms shall not be less than 7 feet (2134 mm) in any horizontal dimension.
Exception: Kitchens.
R304.4 Height effect on room area.
Portions of a room with a sloping ceiling measuring less than 5 feet (1524 mm) or a furred ceiling measuring less than 7 feet (2134 mm) from the finished floor to the finished ceiling shall not be considered as contributing to the minimum required habitable area for that room.
Most starter homes in the US (3 bed 2 bath dbl garage about 1200 to 1500 sq ft) are about 100 to 150 sq ft bedrooms, 150 to 200 sq ft living, family rooms, kitchens, dining areas and 400 sq ft garages, baths tend to varry from 70 to 150 sq ft.
check out the following links:
http://www.iccsafe.org/
http://www.iccsafe.org/e/prodshow.html?prodid=3100S06
http://www.amazon.com/2006-International-Residential-Code-Softcover/dp/1580012531
http://www.techstreet.com/cgi-bin/detail?product_id=1253385&sid=goog book available to download on PDF format
Gold Cost (Chicago) Master Bathroom Renovation by Design Inside