Cukudy Decorative Throw Pillow Cases Cotton Canvas Cushion Cover Michigan Map Mint 18" x 18" Dimensions: 18" x 18" (square). Hidden zipper enclosure. Simplex Knit Fabric; 100% Polyester; Wrinkle Free. Safe to machine wash Designer Tip: To ensure the highest quality print, please note that this products customizable design area measures 18" x 18".