An octagon is an eight-sided geometrical shape known in the design world as the "elephant's foot." Octagon rugs are interesting accent pieces that fit well into spaces with asymmetrical borders.
No matter the shape of the space, it's always a good idea to measure first. Octagon rugs come in a wide variety of materials, from showy silk to summery cotton and natural fibers like sisal. Wool remains the most popular material due to its durability.