As I mentioned before, the number one question we receive from our customers is, “What size area rug do I need?” First thing you have to think about is the size of your living room. If you have an open floor plan, contemporary or loft style living room then generally you will want all of the furniture on the area rug as the picture showing bellow.
This helps define the living space and creates a room within a room. Make sure all of your walkways are clear when measuring and you have arranged the furniture so it is going to be most comfortable.
If you have a more traditional/standard style living room (not an open floor plan) and your living room has hard surface flooring such as hardwoods, tile etc. the front legs of each piece of furniture should be on the area rug. Ideally each piece of furniture would have the front legs siting on the area rug minimum of 8-12 inches.
If you using an area rug on top of wall to wall carpeting, you can get away with a smaller rug and not putting the furniture on top of the area rug.
Keep in mind this is only a best practice guideline, often times the rug that works best for your room is not offered in the exact size you might require at that point custom is the next suggestion.