First decide exactly how much space in your living room do you want to cover by a sofa set. It should be decided by considering the size of your living room. If you want to include other chairs, coffee table and couches in your home decoration living room, then a simple one or a slight L-shaped one will be the best option for you. If you want to make it the focal point of your room, then go for a rounder shaped couch. A lot of seating is provided by this type of couch. A smaller couch will be preferable for a small sized living room.