In many homes, there seems to be one room that is annoyingly smaller than the rest. Whether the architect got lazy in the home stretch when designing the house, or there was just enough space to squeeze in another tiny bedroom to make the home more valuable, little rooms are not uncommon.
You don't need to consider spending a lot of money to tear down a wall to make this problem of limited space disappear. In fact, by being wise with how the room is designed, you can make any space seem like the master suite even if the square footage is closer in size to that of a walk-in closet.
The easiest way to accomplish this is to use a coordinated, monochromatic color scheme that will make the walls, floors and ceiling all blend into each other. By making all the planes blend together, the place where the ceiling meets the walls meet the floor will be harder to identify, making it harder to pinpoint the real size of the room.
From there, choose a window treatment that best complements the tones you employed on the surfaces of the room. First, the number of windows in the room will dictate the kind of window treatment appropriate for the space. If the room has one central window, you can more easily get away with using a drape to decorate it, thus making this the focal point of the space. If you do this, however, limit the decor in the rest of the room, given the fact that the drapery on this one window will probably take up precious space.
If there is more than one window in the room, it's best to veer away from using drapes and stick to a treatment that won't weigh down the aesthetic of the space. A roman shade will effectively control the levels of natural light in the room without overwhelming the design scheme of the room.