The 4' x 6' area rug is a great size in most front door entry areas. This size is the perfect accent of color under a coffee table on wall-to-wall carpet. It shows nicely around the table and is not hidden under the couch or chairs.
A 4x6 rug also looks great at the foot of a bed, in front of a desk in the office, or anywhere a bit of color and artistic design may be needed to add charm and character to an otherwise empty space in the home.
This size also works well at making a dramatic wall-hanging, and is often called 'dozar' or 'prayer-rug'.