Instead of looking at an area rug as something to fill an empty space, look at an area rug as something that is the center of attention. Get a rug that’s too small, and your room will look off-balance. Get a rug that’s too big, and the rest of your decor will look awkward. Not sure how to determine the size of area rug you need? Here are some things to keep in mind. You want the front legs of your couch, chair, etc. to sit on the edge of the rug. If the rug is for your bedroom, you want it to fall on both sides of the bed.