Mainstays 18x18 inch Window Pane Ivory Pillow. This clean modern farmhouse windowpane design is a great layering piece with a block print floral or textured solid decorative pillow. The 18x18" square size layers nicely on a sofa or sectional with oblong accent pillows to complete the finished look of your living room. The cotton/polyester blend has a nice handfeel and is soft to touch. Size: 18" x 18". Color: Gray.