In architecture, proportion is the relationship between your size and the size of the space you are in. Architects understand that people feel differently in different sized spaces. They tend to feel smaller in large spaces and larger in small spaces. But making a space too large can make you feel lost, and making it too small can make you feel constricted. On this Web site, each square on the floorplan represents 3' x 3' of space. Three feet is the typical width of doors and hallways. Keep this in mind while designing rooms for your clients.