What Size Rug Do You Need?
Choose a rug that is two feet shorter than the smallest wall in the room. So for my 10 x12-foot office, I should look at rugs no more than eight feet wide. For your bare front hallway, swing open the front door and then measure the floor from that point, so the first three feet or so remain clear. Hall rugs should have at least six inches of floor showing on all sides.
Dining room rugs should extend at least 18 inches beyond the edge of the table so that the rug accommodates the dining chairs. In bedrooms, try runners at each side and even the foot of the bed, or place a rug one-third of the way under the bed so the rest of the rug creates a nice mat at the bottom of the bed.
In large rooms, rugs should fit the configuration of the room and furniture. A 15 x 20 foot living room, for example, is arranged in one large conversation area, so we should look for a rug to cover and frame that entire area, big enough so that at least the front third of the furniture sits on the rug. A big room set up with two smaller conversation areas would look best with two separate rugs, as long as they’re linked by color or material (they don’t have to match exactly).