For fascinating symmetrical artwork that looks great in any home or apartment, pick up the Square Lined Wall Art - Set of 2. The square wall decor features layers of spirals in black and gray, making an optical illusion that will hold your attention for quite some time. Made from ridged sandstone, these wall decor pieces are available in two different sizes to suit your space requirements. Includes 1-year limited warranty. Small: 13W x 13H inches. Large: 17W x 17H inches.