A 20x20 pillow cover is a versatile decorative choice for sofas, beds, chairs, and everyday seating arrangements. This popular square size is easy to combine with smaller cushions, larger decorative pillows, and lumbar covers. Choose cotton, linen, floral, geometric, or traditional block print patterns to introduce color and texture into your home. Mix printed covers with solid neutral cushions to create a layered appearance that complements modern, farmhouse, and bohemian interiors.