Here are some of the common rug shapes available in the market. Rectangular – It comes in a wide variety of sizes and it is suitable to use for larger rooms, just like from runners to large area rugs. Choose it as per your requirement. Square – Used commonly in square shaped rooms or to define different zones within your room. Circular / Round / Oval – Ideal for smaller rooms or rooms where the key pieces are of similar shape, like a round dining table.